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| Common Name | Scientific Name | Order | Family | Genus | Species | Author | notes |
|---|---|---|---|---|---|---|---|
| common cattle grub | Hypoderma lineatum (Villers) | DIPTERA | Oestridae | Hypoderma | lineatum | (Villers) | |
| common damsel bug | Nabis americoferus Carayon | HEMIPTERA | Nabidae | Nabis | americoferus | Carayon | |
| common eastern bumble bee | Bombus impatiens (Cresson) | HYMENOPTERA | Apidae | Bombus | impatiens | (Cresson) | |
| common green darner | Anax junius (Drury) | ODONATA | Aeshnidae | Anax | junius | (Drury) | |
| common green lacewing | Chrysoperla plorabunda (Fitch) | NEUROPTERA | Chrysopidae | Chrysoperla | plorabunda | (Fitch) | |
| common malaria mosquito | Anopheles quadrimaculatus Say | DIPTERA | Culicidae | Anopheles | quadrimaculatus | Say | |
| composite thrips | Microcephalothrips abdominalis (D.L. Crawford) | THYSANOPTERA | Thripidae | Microcephalothrips | abdominalis | (D.L. Crawford) | |
| Comstock mealybug | Pseudococcus comstocki (Kuwana) | HEMIPTERA | Pseudococcidae | Pseudococcus | comstocki | (Kuwana) | |
| conchuela | Chlorochroa ligata (Say) | HEMIPTERA | Pentatomidae | Chlorochroa | ligata | (Say) | |
| confused flour beetle | Tribolium confusum Jacquelin du Val | COLEOPTERA | Tenebrionidae | Tribolium | confusum | Jacquelin du Val | |
| confusing bumble bee | Bombus perplexus (Cresson) | HYMENOPTERA | Apidae | Bombus | perplexus | (Cresson) | |
| conifer spider mite | Oligonychus coniferarum (McGregor) | ACARI | Tetranychidae | Oligonychus | coniferarum | (McGregor) | |
| convergent lady beetle | Hippodamia convergens Guérin-Méneville | COLEOPTERA | Coccinellidae | Hippodamia | convergens | Guérin-Méneville | |
| Cooley spruce gall adelgid | Adelges cooleyi (Gillette) | HEMIPTERA | Adelgidae | Adelges | cooleyi | (Gillette) | |
| corn blotch leafminer | Agromyza parvicornis Loew | DIPTERA | Agromyzidae | Agromyza | parvicornis | Loew | |
| corn delphacid | Peregrinus maidis (Ashmead) | HEMIPTERA | Delphacidae | Peregrinus | maidis | (Ashmead) | |
| corn earworm* | Helicoverpa zea (Boddie) | LEPIDOPTERA | Noctuidae | Helicoverpa | zea | (Boddie) | *Also called bollworm and tomato fruitworm |
| corn flea beetle | Chaetocnema pulicaria Melsheimer | COLEOPTERA | Chrysomelidae | Chaetocnema | pulicaria | Melsheimer | |
| corn leaf aphid | Rhopalosiphum maidis (Fitch) | HEMIPTERA | Aphididae | Rhopalosiphum | maidis | (Fitch) | |
| corn leafhopper | Dalbulus maidis (DeLong & Wolcott) | HEMIPTERA | Cicadellidae | Dalbulus | maidis | (DeLong & Wolcott) | |
| corn root aphid | Aphis middletoni Thomas | HEMIPTERA | Aphididae | Aphis | middletoni | Thomas | |
| corn root webworm | Neodactria caliginosellus Clemens | LEPIDOPTERA | Crambidae | Neodactria | caliginosellus | Clemens | |
| corn sap beetle | Carpophilus dimidiatus (Fabricius) | COLEOPTERA | Nitidulidae | Carpophilus | dimidiatus | (Fabricius) | |
| corn silk beetle | Metrioidea brunnea (Crotch) | COLEOPTERA | Chrysomelidae | Metrioidea | brunnea | (Crotch) | |
| corn thrips | Frankliniella williamsi Hood | THYSANOPTERA | Thripidae | Frankliniella | williamsi | Hood | |
| cornfield ant | Lasius alienus (Foerster) | HYMENOPTERA | Formicidae | Lasius | alienus | (Foerster) | |
| cosmopolitan grain psocid | Lachesilla pedicularia (Linnaeus) | PSOCOPTERA | Lachesillidae | Lachesilla | pedicularia | (Linnaeus) | |
| cotton aphid* | Aphis gossypii Glover | HEMIPTERA | Aphididae | Aphis | gossypii | Glover | *Also called melon aphid |
| cotton blister mite | Acalitus gossypii (Banks) | ACARI | Eriophyidae | Acalitus | gossypii | (Banks) | |
| cotton fleahopper | Pseudatomoscelis seriatus (Reuter) | HEMIPTERA | Miridae | Pseudatomoscelis | seriatus | (Reuter) | |
| cotton lace bug | Corythucha gossypii (Fabricius) | HEMIPTERA | Tingidae | Corythucha | gossypii | (Fabricius) | |
| cotton leafminer | Stigmella gossypii (Forbes & Leonard) | LEPIDOPTERA | Nepticulidae | Stigmella | gossypii | (Forbes & Leonard) | |
| cotton leafperforator | Bucculatrix thurberiella Busck | LEPIDOPTERA | Bucculatricidae | Bucculatrix | thurberiella | Busck | |
| cotton leafworm | Alabama argillacea (Hübner) | LEPIDOPTERA | Noctuidae | Alabama | argillacea | (Hübner) | |
| cotton square borer | Strymon melinus Hübner | LEPIDOPTERA | Lycaenidae | Strymon | melinus | Hübner | |
| cotton stainer | Dysdercus suturellus (Herrich-Schäffer) | HEMIPTERA | Pyrrhocoridae | Dysdercus | suturellus | (Herrich-Schäffer) | |
| cotton stem moth | Platyedra subcinerea (Haworth) | LEPIDOPTERA | Gelechiidae | Platyedra | subcinerea | (Haworth) | |
| cottonwood borer | Plectrodera scalator (Fabricius) | COLEOPTERA | Cerambycidae | Plectrodera | scalator | (Fabricius) | |
| cottonwood dagger moth | Acronicta lepusculina Guenée | LEPIDOPTERA | Noctuidae | Acronicta | lepusculina | Guenée | |
| cottonwood leaf beetle | Chrysomela scripta Fabricius | COLEOPTERA | Chrysomelidae | Chrysomela | scripta | Fabricius | |
| cottonwood twig borer | Gypsonoma haimbachiana (Kearfott) | LEPIDOPTERA | Tortricidae | Gypsonoma | haimbachiana | (Kearfott) | |
| cottony cushion scale | Icerya purchasi Maskell | HEMIPTERA | Margarodidae | Icerya | purchasi | Maskell | |
| cottony maple scale | Pulvinaria innumerabilis (Rathvon) | HEMIPTERA | Coccidae | Pulvinaria | innumerabilis | (Rathvon) | |
| cottony peach scale | Pulvinaria amygdali Cockerell | HEMIPTERA | Coccidae | Pulvinaria | amygdali | Cockerell | |
| coulee cricket | Peranabrus scabricollis (Thomas) | ORTHOPTERA | Tettigoniidae | Peranabrus | scabricollis | (Thomas) | |
| cowpea aphid | Aphis craccivora Koch | HEMIPTERA | Aphididae | Aphis | craccivora | Koch | |
| cowpea curculio | Chalcodermus aeneus Boheman | COLEOPTERA | Curculionidae | Chalcodermus | aeneus | Boheman | |
| cowpea weevil | Callosobruchus maculatus (Fabricius) | COLEOPTERA | Chrysomelidae | Callosobruchus | maculatus | (Fabricius) | |
| crab louse | Pthirus pubis (Linnaeus) | PHTHIRAPTERA | Pthiridae | Pthirus | pubis | (Linnaeus) | |
| crabhole mosquito | Deinocerites cancer Theobald | DIPTERA | Culicidae | Deinocerites | cancer | Theobald | |
| cranberry fruitworm | Acrobasis vaccinii Riley | LEPIDOPTERA | Pyralidae | Acrobasis | vaccinii | Riley | |
| cranberry girdler | Chrysoteuchia topiaria (Zeller) | LEPIDOPTERA | Crambidae | Chrysoteuchia | topiaria | (Zeller) | |
| cranberry rootworm | Rhabdopterus picipes (Olivier) | COLEOPTERA | Chrysomelidae | Rhabdopterus | picipes | (Olivier) | |
| cranberry weevil | Anthonomus musculus Say | COLEOPTERA | Curculionidae | Anthonomus | musculus | Say | |
| crapemyrtle aphid | Sarucallis kahawaluokalani (Kirkaldy) | HEMIPTERA | Aphididae | Sarucallis | kahawaluokalani | (Kirkaldy) | |
| crazy ant | Paratrechina longicornis (Latreille) | HYMENOPTERA | Formicidae | Paratrechina | longicornis | (Latreille) | |
| creosotebush spider mite | Pseudobryobia drummondi (Ewing) | ACARI | Tetranychidae | Pseudobryobia | drummondi | (Ewing) | |
| crescentmarked lily aphid | Neomyzus circumflexum (Buckton) | HEMIPTERA | Aphididae | Neomyzus | circumflexum | (Buckton) | |
| cribrate weevil | Otiorhynchus cribricollis Gyllenhal | COLEOPTERA | Curculionidae | Otiorhynchus | cribricollis | Gyllenhal | |
| crinkled flannel moth | Lagoa crispata (Packard) | LEPIDOPTERA | Megalopygidae | Lagoa | crispata | (Packard) | |
| cross-striped cabbageworm | Evergestis rimosalis (Guenée) | LEPIDOPTERA | Crambidae | Evergestis | rimosalis | (Guenée) | |
| croton caterpillar | Achaea janata (Linnaeus) | LEPIDOPTERA | Noctuidae | Achaea | janata | (Linnaeus) | |
| croton mussel scale | Lepidosaphes tokionis (Kuwana) | HEMIPTERA | Diaspididae | Lepidosaphes | tokionis | (Kuwana) | |
| Cuban cockroach | Panchlora nivea (Linnaeus) | BLATTODEA | Blaberidae | Panchlora | nivea | (Linnaeus) | |
| Cuban laurel thrips | Gynaikothrips ficorum (Marchal) | THYSANOPTERA | Phlaeothripidae | Gynaikothrips | ficorum | (Marchal) | |
| cucurbit longicorn | Apomecyna saltator (Fabricius) | COLEOPTERA | Cerambycidae | Apomecyna | saltator | (Fabricius) | |
| cucurbit midge | Prodiplosis citrulli (Felt) | DIPTERA | Cecidomyiidae | Prodiplosis | citrulli | (Felt) | |
| curled rose sawfly | Allantus cinctus (Linnaeus) | HYMENOPTERA | Tenthredinidae | Allantus | cinctus | (Linnaeus) | |
| currant aphid | Cryptomyzus ribis (Linnaeus) | HEMIPTERA | Aphididae | Cryptomyzus | ribis | (Linnaeus) | |
| currant borer | Synanthedon tipuliformis (Clerck) | LEPIDOPTERA | Sesiidae | Synanthedon | tipuliformis | (Clerck) | |
| currant bud mite | Cecidophyopsis ribis (Westwood) | ACARI | Eriophyidae | Cecidophyopsis | ribis | (Westwood) | |
| currant fruit fly | Euphranta canadensis (Loew) | DIPTERA | Tephritidae | Euphranta | canadensis | (Loew) | |
| currant fruit weevil | Pseudanthonomus validus Dietz | COLEOPTERA | Curculionidae | Pseudanthonomus | validus | Dietz | |
| currant spanworm | Itame ribearia (Fitch) | LEPIDOPTERA | Geometridae | Itame | ribearia | (Fitch) | |
| currant stem girdler | Janus integer (Norton) | HYMENOPTERA | Cephidae | Janus | integer | (Norton) | |
| cyclamen mite | Phytonemus pallidus (Banks) | ACARI | Tarsonemidae | Phytonemus | pallidus | (Banks) | |
| cynthia moth | Samia cynthia (Drury) | LEPIDOPTERA | Saturniidae | Samia | cynthia | (Drury) | |
| dandelion gall wasp | Phanacis taraxaci (Ashmead) | HYMENOPTERA | Cynipidae | Phanacis | taraxaci | (Ashmead) | |
| dark mealworm | Tenebrio obscurus Fabricius | COLEOPTERA | Tenebrionidae | Tenebrio | obscurus | Fabricius | |
| darksided cutworm | Euxoa messoria (Harris) | LEPIDOPTERA | Noctuidae | Euxoa | messoria | (Harris) | |
| datebug | Asarcopus palmarum Horvath | HEMIPTERA | Issidae | Asarcopus | palmarum | Horvath | |
| dectes stem borer | Dectes texanus LeConte | COLEOPTERA | Cerambycidae | Dectes | texanus | LeConte | |
| Dehli Sands flower-loving fly | Rhaphiomidas terminatus abdominalis Cazier | DIPTERA | Apioceridae | Rhaphiomidas | terminatus abdominalis | Cazier | |
| depluming mite | Neocnemidocoptes gallinae (Railliet) | ACARI | Sarcoptidae | Neocnemidocoptes | gallinae | (Railliet) | |
| depressed flour beetle | Palorus subdepressus (Wollaston) | COLEOPTERA | Tenebrionidae | Palorus | subdepressus | (Wollaston) | |
| desert corn flea beetle | Chaetocnema ectypa Horn | COLEOPTERA | Chrysomelidae | Chaetocnema | ectypa | Horn | |
| desert spider mite | Tetranychus desertorum Banks | ACARI | Tetranychidae | Tetranychus | desertorum | Banks | |
| devastating grasshopper | Melanoplus devastator Scudder | ORTHOPTERA | Acrididae | Melanoplus | devastator | Scudder | |
| diamondback moth | Plutella xylostella (Linnaeus) | LEPIDOPTERA | Plutellidae | Plutella | xylostella | (Linnaeus) | |
| diamondbacked spittlebug | Lepyronia quadrangularis (Say) | HEMIPTERA | Cercopidae | Lepyronia | quadrangularis | (Say) | |
| dictyospermum scale | Chrysomphalus dictyospermi (Morgan) | HEMIPTERA | Diaspididae | Chrysomphalus | dictyospermi | (Morgan) | |
| differential grasshopper | Melanoplus differentialis (Thomas) | ORTHOPTERA | Acrididae | Melanoplus | differentialis | (Thomas) | |
| dingy cutworm | Feltia jaculifera (Guenée) | LEPIDOPTERA | Noctuidae | Feltia | jaculifera | (Guenée) | |
| dobsonfly* | Corydalus cornutus (Linnaeus) | NEUROPTERA | Corydalidae | Corydalus | cornutus | (Linnaeus) | *Immature called hellgrammite |
| dock sawfly | Ametastegia glabrata (Fallén) | HYMENOPTERA | Tenthredinidae | Ametastegia | glabrata | (Fallén) | |
| dodder gall weevil | Smicronyx sculpticollis Casey | COLEOPTERA | Curculionidae | Smicronyx | sculpticollis | Casey | |
| dog biting louse | Trichodectes canis (De Geer) | PHTHIRAPTERA | Trichodectidae | Trichodectes | canis | (De Geer) | |
| dog flea | Ctenocephalides canis (Curtis) | SIPHONAPTERA | Pulicidae | Ctenocephalides | canis | (Curtis) | |
| dog follicle mite | Demodex canis Leydig | ACARI | Demodicidae | Demodex | canis | Leydig | |
| dog sucking louse | Linognathus setosus (Olfers) | PHTHIRAPTERA | Linognathidae | Linognathus | setosus | (Olfers) | |
| dogwood borer | Synanthedon scitula (Harris) | LEPIDOPTERA | Sesiidae | Synanthedon | scitula | (Harris) | |
| dogwood clubgall midge | Resseliella clavula (Beuterm | DIPTERA | Cecidomyiidae | Resseliella | clavula | (Beuterm | |
| dogwood scale | Chionaspis corni Cooley | HEMIPTERA | Diaspididae | Chionaspis | corni | Cooley | |
| dogwood spittlebug | Clastoptera proteus Fitch | HEMIPTERA | Cercopidae | Clastoptera | proteus | Fitch | |
| dogwood twig borer | Oberea tripunctata (Swederus) | COLEOPTERA | Cerambycidae | Oberea | tripunctata | (Swederus) | |
| Douglas-fir beetle | Dendroctonus pseudotsugae Hopkins | COLEOPTERA | Curculionidae | Dendroctonus | pseudotsugae | Hopkins | |
| Douglas-fir cone gall midge | Contarinia oregonensis Foote | DIPTERA | Cecidomyiidae | Contarinia | oregonensis | Foote | |
| Douglas-fir cone moth | Barbara colfaxiana (Kearfott) | LEPIDOPTERA | Tortricidae | Barbara | colfaxiana | (Kearfott) | |
| Douglas-fir cone scale midge | Contarinia washingtonensis Johnson | DIPTERA | Cecidomyiidae | Contarinia | washingtonensis | Johnson | |
| Douglas-fir engraver | Scolytus unispinosus LeConte | COLEOPTERA | Curculionidae | Scolytus | unispinosus | LeConte | |
| Douglas-fir pitch moth | Synanthedon novaroensis (Hy. Edwards) | LEPIDOPTERA | Sesiidae | Synanthedon | novaroensis | (Hy. Edwards) | |
| Douglas-fir pole beetle | Pseudohylesinus nebulosus (LeConte) | COLEOPTERA | Curculionidae | Pseudohylesinus | nebulosus | (LeConte) | |
| Douglas-fir tussock moth | Orgyia pseudotsugata (McDunnough) | LEPIDOPTERA | Lymantriidae | Orgyia | pseudotsugata | (McDunnough) | |
| Douglas-fir twig weevil | Cylindrocopturus furnissi Buchanan | COLEOPTERA | Curculionidae | Cylindrocopturus | furnissi | Buchanan | |
| driedfruit beetle | Carpophilus hemipterus (Linnaeus) | COLEOPTERA | Nitidulidae | Carpophilus | hemipterus | (Linnaeus) | |
| driedfruit mite | Carpoglyphus lactis (Linnaeus) | ACARI | Carpoglyphidae | Carpoglyphus | lactis | (Linnaeus) | |
| driedfruit moth | Vitula serratilineella Ragonot | LEPIDOPTERA | Pyralidae | Vitula | serratilineella | Ragonot | |
| drone fly | Eristalis tenax (Linnaeus) | DIPTERA | Syrphidae | Eristalis | tenax | (Linnaeus) | |
| drugstore beetle | Stegobium paniceum (Linnaeus) | COLEOPTERA | Anobiidae | Stegobium | paniceum | (Linnaeus) | |
| dryberry mite | Phyllocoptes gracilis (Nalepa) | ACARI | Eriophyidae | Phyllocoptes | gracilis | (Nalepa) | |
| dryland wireworm | Ctenicera glauca (Germar) | COLEOPTERA | Elateridae | Ctenicera | glauca | (Germar) | |
| dusky birch sawfly | Craesus latitarsus Norton | HYMENOPTERA | Tenthredinidae | Craesus | latitarsus | Norton | |
| dusky sap beetle | Carpophilus lugubris Murray | COLEOPTERA | Nitidulidae | Carpophilus | lugubris | Murray | |
| dusky stink bug | Euschistus tristigmus (Say) | HEMIPTERA | Pentatomidae | Euschistus | tristigmus | (Say) | |
| duskyback leafroller | Archips mortuana (Kearfott) | LEPIDOPTERA | Tortricidae | Archips | mortuana | (Kearfott) | |
| ear tick | Otobius megnini (Dug | ACARI | Argasidae | Otobius | megnini | (Dugès) | |
| eastern bat bug | Cimex adjunctus Barber | HEMIPTERA | Cimicidae | Cimex | adjunctus | Barber | |
| eastern blackheaded budworm | Acleris variana (Fernald) | LEPIDOPTERA | Tortricidae | Acleris | variana | (Fernald) | |
| eastern cicada killer* | Sphecius speciosus (Drury) | HYMENOPTERA | Crabronidae | Sphecius | speciosus | (Drury) | *Also called cicada killer |
| eastern field wireworm | Limonius agonus (Say) | COLEOPTERA | Elateridae | Limonius | agonus | (Say) | |
| eastern fivespined ips | Ips grandicollis (Eichhoff) | COLEOPTERA | Curculionidae | Ips | grandicollis | (Eichhoff) | |
| eastern grape leafhopper | Erythroneura comes (Say) | HEMIPTERA | Cicadellidae | Erythroneura | comes | (Say) | |
| eastern Hercules beetle | Dynastes tityus (Linnaeus) | COLEOPTERA | Scarabaeidae | Dynastes | tityus | (Linnaeus) | |
| eastern larch beetle | Dendroctonus simplex LeConte | COLEOPTERA | Curculionidae | Dendroctonus | simplex | LeConte | |
| eastern lubber grasshopper | Romalea guttata (Houttuyn) | ORTHOPTERA | Acrididae | Romalea | guttata | (Houttuyn) | |
| eastern pine looper | Lambdina pellucidaria (Grote & Robinson) | LEPIDOPTERA | Geometridae | Lambdina | pellucidaria | (Grote & Robinson) | |
| eastern pine seedworm | Cydia toreuta (Grote) | LEPIDOPTERA | Tortricidae | Cydia | toreuta | (Grote) | |
| eastern pine shoot borer | Eucosma gloriola Heinrich | LEPIDOPTERA | Tortricidae | Eucosma | gloriola | Heinrich | |
| eastern pine weevil | Pissodes nemorensis Germar | COLEOPTERA | Curculionidae | Pissodes | nemorensis | Germar | |
| eastern spruce gall adelgid | Adelges abietis (Linnaeus) | HEMIPTERA | Adelgidae | Adelges | abietis | (Linnaeus) | |
| eastern subterranean termite | Reticulitermes flavipes (Kollar) | ISOPTERA | Rhinotermitidae | Reticulitermes | flavipes | (Kollar) | |
| eastern tent caterpillar | Malacosoma americanum (Fabricius) | LEPIDOPTERA | Lasiocampidae | Malacosoma | americanum | (Fabricius) | |
| eastern yellowjacket | Vespula maculifrons (Buysson) | HYMENOPTERA | Vespidae | Vespula | maculifrons | (Buysson) | |
| eggplant flea beetle | Epitrix fuscula Crotch | COLEOPTERA | Chrysomelidae | Epitrix | fuscula | Crotch | |
| eggplant lace bug | Gargaphia solani Heidemann | HEMIPTERA | Tingidae | Gargaphia | solani | Heidemann | |
| eggplant leafminer | Tildenia inconspicuella (Murtfeldt) | LEPIDOPTERA | Gelechiidae | Tildenia | inconspicuella | (Murtfeldt) | |
| Egyptian alfalfa weevil | Hypera brunnipennis (Boheman) | COLEOPTERA | Curculionidae | Hypera | brunnipennis | (Boheman) | |
| eightspotted forester | Alypia octomaculata (Fabricius) | LEPIDOPTERA | Noctuidae | Alypia | octomaculata | (Fabricius) | |
| El Segundo blue | Euphilotes battoides allyni (Shields) | LEPIDOPTERA | Lycaenidae | Euphilotes | battoides allyni | (Shields) | |
| elder shoot borer | Achatodes zeae (Harris) | LEPIDOPTERA | Noctuidae | Achatodes | zeae | (Harris) | |
| elm borer | Saperda tridentata Olivier | COLEOPTERA | Cerambycidae | Saperda | tridentata | Olivier | |
| elm calligrapha | Calligrapha scalaris (LeConte) | COLEOPTERA | Chrysomelidae | Calligrapha | scalaris | (LeConte) | |
| elm casebearer | Coleophora ulmifoliella McDunnough | LEPIDOPTERA | Coleophoridae | Coleophora | ulmifoliella | McDunnough | |
| elm cockscombgall aphid | Colopha ulmicola (Fitch) | HEMIPTERA | Aphididae | Colopha | ulmicola | (Fitch) | |
| elm flea beetle | Altica carinata Germar | COLEOPTERA | Chrysomelidae | Altica | carinata | Germar | |
| elm lace bug | Corythucha ulmi Osborn & Drake | HEMIPTERA | Tingidae | Corythucha | ulmi | Osborn & Drake | |
| elm leaf aphid | Tinocallis ulmifolii (Monell) | HEMIPTERA | Aphididae | Tinocallis | ulmifolii | (Monell) | |
| elm leaf beetle | Xanthogaleruca luteola (Müller) | COLEOPTERA | Chrysomelidae | Xanthogaleruca | luteola | (Müller) | |
| elm leafminer | Fenusa ulmi Sundeval | HYMENOPTERA | Tenthredinidae | Fenusa | ulmi | Sundeval | |
| elm sawfly | Cimbex americana Leach | HYMENOPTERA | Cimbicidae | Cimbex | americana | Leach | |
| elm scurfy scale | Chionaspis americana Johnson | HEMIPTERA | Diaspididae | Chionaspis | americana | Johnson | |
| elm spanworm | Ennomos subsignaria (Hübner) | LEPIDOPTERA | Geometridae | Ennomos | subsignaria | (Hübner) | |
| elm sphinx | Ceratomia amyntor (Geyer) | LEPIDOPTERA | Sphingidae | Ceratomia | amyntor | (Geyer) | |
| elongate flea beetle | Systena elongata (Fabricius) | COLEOPTERA | Chrysomelidae | Systena | elongata | (Fabricius) | |
| elongate hemlock scale | Fiorinia externa Ferris | HEMIPTERA | Diaspididae | Fiorinia | externa | Ferris | |
| emarginate ips | Ips emarginatus (LeConte) | COLEOPTERA | Curculionidae | Ips | emarginatus | (LeConte) | |
| emerald ash borer | Agrilus planipennis Fairmaire | COLEOPTERA | Buprestidae | Agrilus | planipennis | Fairmaire | |
| emerald cockroach wasp | Ampulex compressa (Fabricius) | HYMENOPTERA | Sphecidae | Ampulex | compressa | (Fabricius) | |
| Engelmann spruce weevil* | Pissodes strobi (Peck) | COLEOPTERA | Curculionidae | Pissodes | strobi | (Peck) | *Also called Sitka spruce weevil and white pine weevil |
| English grain aphid | Sitobion avenae (Fabricius) | HEMIPTERA | Aphididae | Sitobion | avenae | (Fabricius) | |
| erigeron root aphid | Aphis middletonii Thomas | HEMIPTERA | Aphididae | Aphis | middletonii | Thomas | |
| ermine moth | Yponomeuta padella (Linnaeus) | LEPIDOPTERA | Yponomeutidae | Yponomeuta | padella | (Linnaeus) | |
| eucalyptus longhorned borer | Phoracantha semipunctata (Fabricius) | COLEOPTERA | Cerambycidae | Phoracantha | semipunctata | (Fabricius) | |
| eugenia caterpillar | Targalla delatrix (Guenée) | LEPIDOPTERA | Noctuidae | Targalla | delatrix | (Guenée) | |
| euonymus scale | Unaspis euonymi (Comstock) | HEMIPTERA | Diaspididae | Unaspis | euonymi | (Comstock) | |
| eupatorium gall fly | Procecidochares utilis Stone | DIPTERA | Tephritidae | Procecidochares | utilis | Stone | |
| Eurasian pine adelgid | Pineus pini (Macquart) | HEMIPTERA | Adelgidae | Pineus | pini | (Macquart) | |
| European alder leafminer | Fenusa dohrnii (Tischbein) | HYMENOPTERA | Tenthredinidae | Fenusa | dohrnii | (Tischbein) | |
| European apple sawfly | Hoplocampa testudinea (Klug) | HYMENOPTERA | Tenthredinidae | Hoplocampa | testudinea | (Klug) | |
| European chafer | Rhizotrogus majalis (Razoumowsky) | COLEOPTERA | Scarabaeidae | Rhizotrogus | majalis | (Razoumowsky) | |
| European chicken flea | Ceratophyllus gallinae (Schrank) | SIPHONAPTERA | Ceratophyllidae | Ceratophyllus | gallinae | (Schrank) | |
| European corn borer | Ostrinia nubilalis (Hübner) | LEPIDOPTERA | Crambidae | Ostrinia | nubilalis | (Hübner) | |
| European crane fly | Tipula paludosa Meigen | DIPTERA | Tipulidae | Tipula | paludosa | Meigen | |
| European earwig | Forficula auricularia Linnaeus | DERMAPTERA | Forficulidae | Forficula | auricularia | Linnaeus | |
| European elm bark beetle | Scolytus multistriatus (Marsham) | COLEOPTERA | Curculionidae | Scolytus | multistriatus | (Marsham) | |
| European elm flea weevil | Orchestes alni (Linnaeus) | COLEOPTERA | Curculionidae | Orchestes | alni | (Linnaeus) | |
| European elm scale | Eriococcus spurius (Modeer) | HEMIPTERA | Eriococcidae | Eriococcus | spurius | (Modeer) | |
| European fruit lecanium | Parthenolecanium corni (Bouché) | HEMIPTERA | Coccidae | Parthenolecanium | corni | (Bouché) | |
| European fruit scale | Quadraspidiotus ostreaeformis (Curtis) | HEMIPTERA | Diaspididae | Quadraspidiotus | ostreaeformis | (Curtis) | |
| European grain moth | Nemapogon granella (Linnaeus) | LEPIDOPTERA | Tineidae | Nemapogon | granella | (Linnaeus) | |
| European grapevine moth | Lobesia botrana (Denis & Schiffermüller) | LEPIDOPTERA | Tortricidae | Lobesia | botrana | (Denis & Schiffermüller) | |
| European honeysuckle leafroller | Ypsolopha dentella (Fabricius) | LEPIDOPTERA | Plutellidae | Ypsolopha | dentella | (Fabricius) | |
| European hornet | Vespa crabro Linnaeus | HYMENOPTERA | Vespidae | Vespa | crabro | Linnaeus | |
| European house dust mite | Chorioptes pteronyssinus Hering | ACARI | Epidermoptidae | Chorioptes | pteronyssinus | Hering | |
| European mantid | Mantis religiosa Linnaeus | MANTODEA | Mantidae | Mantis | religiosa | Linnaeus | |
| European mouse flea | Leptopsylla segnis (Schönherr) | SIPHONAPTERA | Leptopsyllidae | Leptopsylla | segnis | (Schönherr) | |
| European oak borer | Agrilus sulcicollis Lacordaire | COLEOPTERA | Buprestidae | Agrilus | sulcicollis | Lacordaire | |
| European paper wasp | Polistes dominula (Christ) | HYMENOPTERA | Vespidae | Polistes | dominula | (Christ) | |
| European paper wasp | Polistes dominula (Christ) | HYMENOPTERA | Vespidae | Polistes | dominula | (Christ) | |
| European peach scale | Parthenolecanium persicae (Fabricius) | HEMIPTERA | Coccidae | Parthenolecanium | persicae | (Fabricius) | |
| European pine sawfly | Neodiprion sertifer (Geoffroy) | HYMENOPTERA | Diprionidae | Neodiprion | sertifer | (Geoffroy) | |
| European pine shoot moth | Rhyacionia buoliana ([Denis & Schiffermüller]) | LEPIDOPTERA | Tortricidae | Rhyacionia | buoliana | ([Denis & Schiffermüller]) | |
| European red mite | Panonychus ulmi (Koch) | ACARI | Tetranychidae | Panonychus | ulmi | (Koch) | |
| European spruce beetle | Dendroctonus micans (Kugelann) | COLEOPTERA | Curculionidae | Dendroctonus | micans | (Kugelann) | |
| European spruce sawfly | Gilpinia hercyniae (Hartig) | HYMENOPTERA | Diprionidae | Gilpinia | hercyniae | (Hartig) | |
| European wheat stem sawfly | Cephus pygmaeus (Linnaeus) | HYMENOPTERA | Cephidae | Cephus | pygmaeus | (Linnaeus) | |
| eyed click beetle | Alaus oculatus (Linnaeus) | COLEOPTERA | Elateridae | Alaus | oculatus | (Linnaeus) | |
| eyespotted bud moth | Spilonota ocellana ([Denis & Schiffermüller]) | LEPIDOPTERA | Tortricidae | Spilonota | ocellana | ([Denis & Schiffermüller]) | |
| face fly | Musca autumnalis De Geer | DIPTERA | Muscidae | Musca | autumnalis | De Geer | |
| fall armyworm | Spodoptera frugiperda (J.E. Smith) | LEPIDOPTERA | Noctuidae | Spodoptera | frugiperda | (J.E. Smith) | |
| fall cankerworm | Alsophila pometaria (Harris) | LEPIDOPTERA | Geometridae | Alsophila | pometaria | (Harris) | |
| fall webworm | Hyphantria cunea (Drury) | LEPIDOPTERA | Arctiidae | Hyphantria | cunea | (Drury) | |
| false celery leaftier | Udea profundalis (Packard) | LEPIDOPTERA | Crambidae | Udea | profundalis | (Packard) | |
| false chinch bug | Nysius raphanus Howard | HEMIPTERA | Blissidae | Nysius | raphanus | Howard | |
| false German cockroach | Blattella lituricollis (Walker) | BLATTODEA | Blattellidae | Blattella | lituricollis | (Walker) | |
| false hemlock looper | Nepytia canosaria (Walker) | LEPIDOPTERA | Geometridae | Nepytia | canosaria | (Walker) | |
| false potato beetle | Leptinotarsa juncta (Germar) | COLEOPTERA | Chrysomelidae | Leptinotarsa | juncta | (Germar) | |
| false stable fly | Muscina stabulans (Fallén) | DIPTERA | Muscidae | Muscina | stabulans | (Fallén) | |
| feather mite | Megninia cubitalis (Mégnin) | ACARI | Analgidae | Megninia | cubitalis | (Mégnin) | |
| fern aphid | Idiopterus nephrelepidis Davis | HEMIPTERA | Aphididae | Idiopterus | nephrelepidis | Davis | |
| fern scale | Pinnaspis aspidistrae (Signoret) | HEMIPTERA | Diaspididae | Pinnaspis | aspidistrae | (Signoret) | |
| Fernald cuckoo bumble bee | Bombus fernaldae (Franklin) | HYMENOPTERA | Apidae | Bombus | fernaldae | (Franklin) | |
| fiery hunter | Calosoma calidum (Fabricius) | COLEOPTERA | Carabidae | Calosoma | calidum | (Fabricius) | |
| fiery skipper | Hylephila phyleus (Drury) | LEPIDOPTERA | Hesperiidae | Hylephila | phyleus | (Drury) | |
| fig mite | Aceria fica (Cotte) | ACARI | Eriophyidae | Aceria | fica | (Cotte) | |
| fig scale | Lepidosaphes conchiformis (Gmelin) | HEMIPTERA | Diaspididae | Lepidosaphes | conchiformis | (Gmelin) | |
| fig wasp | Blastophaga psenes (Linnaeus) | HYMENOPTERA | Agaonidae | Blastophaga | psenes | (Linnaeus) | |
| Fijian ginger weevil | Elytroteinus subtruncatus (Fairmaire) | COLEOPTERA | Curculionidae | Elytroteinus | subtruncatus | (Fairmaire) | |
| filament borer | Nematocampa resistaria (Herrich-Schäffer) | LEPIDOPTERA | Geometridae | Nematocampa | resistaria | (Herrich-Schäffer) | |
| filbert aphid | Myzocallis coryli (Goetze) | HEMIPTERA | Aphididae | Myzocallis | coryli | (Goetze) | |
| filbert bud mite | Phytopus avellanae (Nalepa) | ACARI | Phytopidae | Phytopus | avellanae | (Nalepa) | |
| filbert weevil | Curculio uniformis (LeConte) | COLEOPTERA | Curculionidae | Curculio | uniformis | (LeConte) | |
| filbertworm | Cydia latiferreana (Walsingham) | LEPIDOPTERA | Tortricidae | Cydia | latiferreana | (Walsingham) | |
| fir cone looper | Eupithecia spermaphaga (Dyar) | LEPIDOPTERA | Geometridae | Eupithecia | spermaphaga | (Dyar) | |
| fir engraver | Scolytus ventralis LeConte | COLEOPTERA | Curculionidae | Scolytus | ventralis | LeConte | |
| fir root bark beetle | Pseudohylesinus granulatus (LeConte) | COLEOPTERA | Curculionidae | Pseudohylesinus | granulatus | (LeConte) | |
| fir seed moth | Cydia bracteatana (Fernald) | LEPIDOPTERA | Tortricidae | Cydia | bracteatana | (Fernald) | |
| firebrat | Thermobia domestica (Packard) | THYSANURA | Lepismatidae | Thermobia | domestica | (Packard) | |
| firtree borer | Semanotus litigiosus (Casey) | COLEOPTERA | Cerambycidae | Semanotus | litigiosus | (Casey) | |
| fivespotted gamagrass leafhopper | Dalbulus quinquenotatus DeLong & Nault | HEMIPTERA | Cicadellidae. | Dalbulus | quinquenotatus | DeLong & Nault | |
| flat grain beetle | Cryptolestes pusillus (Schönherr) | COLEOPTERA | Laemophloeidae | Cryptolestes | pusillus | (Schönherr) | |
| flatheaded appletree borer | Chrysobothris femorata (Olivier) | COLEOPTERA | Buprestidae | Chrysobothris | femorata | (Olivier) | |
| flatheaded cone borer | Chrysophana placida conicola Van Dyke | COLEOPTERA | Buprestidae | Chrysophana | placida conicola | Van Dyke | |
| flatheaded fir borer | Phaenops drummondi (Kirby) | COLEOPTERA | Buprestidae | Phaenops | drummondi | (Kirby) | |
| flax bollworm | Heliothis ononis Denis & Schiffermüller | LEPIDOPTERA | Noctuidae | Heliothis | ononis | Denis & Schiffermüller | |
| Fletcher scale | Parthenolecanium fletcheri (Cockerell) | HEMIPTERA | Coccidae | Parthenolecanium | fletcheri | (Cockerell) | |
| floodwater mosquito | Aedes sticticus (Meigen) | DIPTERA | Culicidae | Aedes | sticticus | (Meigen) | |
| Florida carpenter ant | Camponotus atriceps (Fr. Smith) | HYMENOPTERA | Formicidae | Camponotus | atriceps | (Fr. Smith) | |
| Florida fern caterpillar | Callopistria floridensis (Guenée) | LEPIDOPTERA | Noctuidae | Callopistria | floridensis | (Guenée) | |
| Florida harvester ant | Pogonomyrmex badius (Latreille) | HYMENOPTERA | Formicidae | Pogonomyrmex | badius | (Latreille) |