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| Common Name | Scientific Name | Order | Family | Genus | Species | Author | notes |
|---|---|---|---|---|---|---|---|
| ninespotted lady beetle | Coccinella novemnotata Herbst | COLEOPTERA | Coccinellidae | Coccinella | novemnotata | Herbst | |
| northeastern sawyer | Monochamus notatus (Drury) | COLEOPTERA | Cerambycidae | Monochamus | notatus | (Drury) | |
| northern amber bumble bee | Bombus borealis (Kirby) | HYMENOPTERA | Apidae | Bombus | borealis | (Kirby) | |
| northern cattle grub | Hypoderma bovis (Linnaeus) | DIPTERA | Oestridae | Hypoderma | bovis | (Linnaeus) | |
| northern corn rootworm | Diabrotica barberi Smith & Lawrence | COLEOPTERA | Chrysomelidae | Diabrotica | barberi | Smith & Lawrence | |
| northern fowl mite | Ornithonyssus sylviarum (Canestrini & Fanzago) | ACARI | Macronyssidae | Ornithonyssus | sylviarum | (Canestrini & Fanzago) | |
| northern house mosquito | Culex pipiens Linnaeus | DIPTERA | Culicidae | Culex | pipiens | Linnaeus | |
| northern masked chafer | Cyclocephala borealis Arrow | COLEOPTERA | Scarabaeidae | Cyclocephala | borealis | Arrow | |
| northern mole cricket | Neocurtilla hexadactyla (Perty) | ORTHOPTERA | Gryllotalpidae | Neocurtilla | hexadactyla | (Perty) | |
| northern pitch twig moth | Retinia albicapitana (Busck) | LEPIDOPTERA | Tortricidae | Retinia | albicapitana | (Busck) | |
| northern rat flea | Nosopsyllus fasciatus (Bosc) | SIPHONAPTERA | Ceratophyllidae | Nosopsyllus | fasciatus | (Bosc) | |
| northern spruce engraver | Ips perturbatus (Eichoff) | COLEOPTERA | Curculionidae | Ips | perturbatus | (Eichoff) | |
| northern tamarisk beetle | Diorhabda carinulata (Desbrochers) | COLEOPTERA | Chrysomelidae | Diorhabda | carinulata | (Desbrochers) | |
| northwest coast mosquito | Aedes aboriginis Dyar | DIPTERA | Culicidae | Aedes | aboriginis | Dyar | |
| Norway maple aphid | Periphyllus lyropictus (Kessler) | HEMIPTERA | Aphididae | Periphyllus | lyropictus | (Kessler) | |
| nose bot fly | Gasterophilus haemorrhoidalis (Linnaeus) | DIPTERA | Oestridae | Gasterophilus | haemorrhoidalis | (Linnaeus) | |
| nutgrass armyworm | Spodoptera exempta (Walker) | LEPIDOPTERA | Noctuidae | Spodoptera | exempta | (Walker) | |
| nutgrass billbug | Sphenophorus cariosus (Olivier) | COLEOPTERA | Curculionidae | Sphenophorus | cariosus | (Olivier) | |
| nutgrass borer moth | Bactra venosana (Zeller) | LEPIDOPTERA | Tortricidae | Bactra | venosana | (Zeller) | |
| nutgrass weevil | Athesapeuta cyperi Marshall | COLEOPTERA | Curculionidae | Athesapeuta | cyperi | Marshall | |
| Nuttall blister beetle | Lytta nuttalli Say | COLEOPTERA | Meloidae | Lytta | nuttalli | Say | |
| oak clearwing moth | Paranthrene asilipennis (Guérin-Méneville) | LEPIDOPTERA | Sesiidae | Paranthrene | asilipennis | (Guérin-Méneville) | |
| oak lace bug | Corythucha arcuata (Say) | HEMIPTERA | Tingidae | Corythucha | arcuata | (Say) | |
| oak leafroller | Archips semiferanus (Walker) | LEPIDOPTERA | Tortricidae | Archips | semiferanus | (Walker) | |
| oak leaftier | Croesia semipurpurana (Kearfott) | LEPIDOPTERA | Tortricidae | Croesia | semipurpurana | (Kearfott) | |
| oak lecanium | Parthenolecanium quercifex (Fitch) | HEMIPTERA | Coccidae | Parthenolecanium | quercifex | (Fitch) | |
| oak rough bulletgall wasp | Disholcaspis quercusmamma (Walsh) | HYMENOPTERA | Cynipidae | Disholcaspis | quercusmamma | (Walsh) | |
| oak sapling borer | Goes tesselatus (Haldeman) | COLEOPTERA | Cerambycidae | Goes | tesselatus | (Haldeman) | |
| oak skeletonizer | Bucculatrix ainsliella Murtfeldt | LEPIDOPTERA | Bucculatricidae | Bucculatrix | ainsliella | Murtfeldt | |
| oak timberworm | Arrhenodes minutus (Drury) | COLEOPTERA | Brentidae | Arrhenodes | minutus | (Drury) | |
| oak webworm | Archips fervidana (Clemens) | LEPIDOPTERA | Tortricidae | Archips | fervidana | (Clemens) | |
| obliquebanded leafroller | Choristoneura rosaceana (Harris) | LEPIDOPTERA | Tortricidae | Choristoneura | rosaceana | (Harris) | |
| obscure mealybug | Pseudococcus viburni (Signoret) | HEMIPTERA | Pseudococcidae | Pseudococcus | viburni | (Signoret) | |
| obscure root weevil | Sciopithes obscurus Horn | COLEOPTERA | Curculionidae | Sciopithes | obscurus | Horn | |
| obscure scale | Melanaspis obscura (Comstock) | HEMIPTERA | Diaspididae | Melanaspis | obscura | (Comstock) | |
| oceanic burrower bug | Geotomus pygmaeus (Dallas) | HEMIPTERA | Cydnidae | Geotomus | pygmaeus | (Dallas) | |
| oceanic embiid | Aposthonia oceania (Ross) | EMBIIDINA | Oligotomidae | Aposthonia | oceania | (Ross) | |
| oceanic field cricket | Teleogryllus oceanicus (Le Guillou) | ORTHOPTERA | Gryllidae | Teleogryllus | oceanicus | (Le Guillou) | |
| odd beetle | Thylodrias contractus Motschulsky | COLEOPTERA | Dermestidae | Thylodrias | contractus | Motschulsky | |
| odorous house ant | Tapinoma sessile (Say) | HYMENOPTERA | Formicidae | Tapinoma | sessile | (Say) | |
| old house borer | Hylotrupes bajulus (Linnaeus) | COLEOPTERA | Cerambycidae | Hylotrupes | bajulus | (Linnaeus) | |
| oleander aphid | Aphis nerii Boyer de Fonscolombe | HEMIPTERA | Aphididae | Aphis | nerii | Boyer de Fonscolombe | |
| oleander hawk moth | Daphnis nerii (Linnaeus) | LEPIDOPTERA | Sphingidae | Daphnis | nerii | (Linnaeus) | |
| oleander pit scale | Asterolecanium pustulans (Cockerell) | HEMIPTERA | Asterolecaniidae | Asterolecanium | pustulans | (Cockerell) | |
| oleander scale | Aspidiotus nerii Bouch | HEMIPTERA | Diaspididae | Aspidiotus | nerii | Bouch | |
| olive fruit fly | Bactrocera oleae (Gmelin) | DIPTERA | Tephritidae | Bactrocera | oleae | (Gmelin) | |
| olive scale | Parlatoria oleae (Colvée) | HEMIPTERA | Diaspididae | Parlatoria | oleae | (Colvée) | |
| omnivorous leafroller | Platynota stultana Walsingham | LEPIDOPTERA | Tortricidae | Platynota | stultana | Walsingham | |
| omnivorous leaftier | Cnephasia longana (Haworth) | LEPIDOPTERA | Tortricidae | Cnephasia | longana | (Haworth) | |
| omnivorous looper | Sabulodes aegrotata (Guenée) | LEPIDOPTERA | Geometridae | Sabulodes | aegrotata | (Guenée) | |
| onespotted stink bug | Euschistus variolarius (Palisot de Beauvois) | HEMIPTERA | Pentatomidae | Euschistus | variolarius | (Palisot de Beauvois) | |
| onion aphid | Neotoxoptera formosana (Takahashi) | HEMIPTERA | Aphididae | Neotoxoptera | formosana | (Takahashi) | |
| onion bulb fly | Eumerus strigatus (Fallén) | DIPTERA | Syrphidae | Eumerus | strigatus | (Fallén) | |
| onion maggot | Delia antiqua (Meigen) | DIPTERA | Anthomyiidae | Delia | antiqua | (Meigen) | |
| onion plant bug | Labopidea allii (Knight) | HEMIPTERA | Miridae | Labopidea | allii | (Knight) | |
| onion thrips | Thrips tabaci Lindeman | THYSANOPTERA | Thripidae | Thrips | tabaci | Lindeman | |
| orange mint moth | Pyrausta orphisalis Walker | LEPIDOPTERA | Crambidae | Pyrausta | orphisalis | Walker | |
| orange spiny whitefly | Aleurocanthus spiniferus (Quaintance) | HEMIPTERA | Aleyrodidae | Aleurocanthus | spiniferus | (Quaintance) | |
| orange tortrix | Argyrotaenia franciscana (Walsingham) | LEPIDOPTERA | Tortricidae | Argyrotaenia | franciscana | (Walsingham) | |
| orangedog | Papilio cresphontes Cramer | LEPIDOPTERA | Papilionidae | Papilio | cresphontes | Cramer | |
| orangehumped mapleworm | Symmerista leucitys Franclemont | LEPIDOPTERA | Notodontidae | Symmerista | leucitys | Franclemont | |
| orangestriped oakworm | Anisota senatoria (J.E. Smith) | LEPIDOPTERA | Saturniidae | Anisota | senatoria | (J.E. Smith) | |
| orangetailed potter wasp | Delta latreillei petiolare (Schulz) | HYMENOPTERA | Vespidae | Delta | latreillei petiolare | (Schulz) | |
| orchid aphid | Sitobion luteum (Buckton) | HEMIPTERA | Aphididae | Sitobion | luteum | (Buckton) | |
| orchidfly | Eurytoma orchidearum (Westwood) | HYMENOPTERA | Eurytomidae | Eurytoma | orchidearum | (Westwood) | |
| Oregon fir sawyer | Monochamus scutellatus oregonensis (LeConte) | COLEOPTERA | Cerambycidae | Monochamus | scutellatus oregonensis | (LeConte) | |
| Oregon wireworm | Melanotus longulus oregonensis (LeConte) | COLEOPTERA | Elateridae | Melanotus | longulus oregonensis | (LeConte) | |
| oriental beetle | Anomala orientalis (Waterhouse) | COLEOPTERA | Scarabaeidae | Anomala | orientalis | (Waterhouse) | |
| oriental cockroach | Blatta orientalis Linnaeus | BLATTODEA | Blattidae | Blatta | orientalis | Linnaeus | |
| oriental fruit fly | Bactrocera dorsalis Hendel | DIPTERA | Tephritidae | Bactrocera | dorsalis | Hendel | |
| oriental fruit moth | Grapholita molesta (Busck) | LEPIDOPTERA | Tortricidae | Grapholita | molesta | (Busck) | |
| oriental house fly | Musca domestica vicina Macquart | DIPTERA | Muscidae | Musca | domestica vicina | Macquart | |
| oriental moth | Cnidocampa flavescens (Walker) | LEPIDOPTERA | Limacodidae | Cnidocampa | flavescens | (Walker) | |
| oriental rat flea | Xenopsylla cheopis (Rothschild) | SIPHONAPTERA | Pulicidae | Xenopsylla | cheopis | (Rothschild) | |
| oriental stink bug | Plautia stali Scott | HEMIPTERA | Pentatomidae | Plautia | stali | Scott | |
| ornate aphid | Myzus ornatus Laing | HEMIPTERA | Aphididae | Myzus | ornatus | Laing | |
| orthezia lady beetle | Hyperaspis jocosa (Mulsant) | COLEOPTERA | Coccinellidae | Hyperaspis | jocosa | (Mulsant) | |
| oval guineapig louse | Gyropus ovalis Burmeister | PHTHIRAPTERA | Gyropidae | Gyropus | ovalis | Burmeister | |
| oxalis spider mite | Tetranychina harti (Ewing) | ACARI | Tetranychidae | Tetranychina | harti | (Ewing) | |
| oxalis whitefly | Aleyrodes shizuokensis Kuwana | HEMIPTERA | Aleyrodidae | Aleyrodes | shizuokensis | Kuwana | |
| oystershell scale | Lepidosaphes ulmi (Linnaeus) | HEMIPTERA | Diaspididae | Lepidosaphes | ulmi | (Linnaeus) | |
| Pacific beetle cockroach | Diploptera punctata (Eschscholtz) | BLATTODEA | Blaberidae | Diploptera | punctata | (Eschscholtz) | |
| Pacific cicada killer | Sphecius convallis (Patton) | HYMENOPTERA | Crabronidae | Sphecius | convallis | (Patton) | |
| Pacific Coast tick | Dermacentor occidentalis Marx | ACARI | Ixodidae | Dermacentor | occidentalis | Marx | |
| Pacific Coast wireworm | Limonius canus LeConte | COLEOPTERA | Elateridae | Limonius | canus | LeConte | |
| Pacific cockroach | Euthyrrhapha pacifica (Coquebert) | BLATTODEA | Polyphagidae | Euthyrrhapha | pacifica | (Coquebert) | |
| Pacific dampwood termite | Zootermopsis angusticollis (Hagen) | ISOPTERA | Termopsidae | Zootermopsis | angusticollis | (Hagen) | |
| Pacific flatheaded borer | Chrysobothris mali Horn | COLEOPTERA | Buprestidae | Chrysobothris | mali | Horn | |
| Pacific kissing bug | Oncocephalus pacificus (Kirkaldy) | HEMIPTERA | Reduviidae | Oncocephalus | pacificus | (Kirkaldy) | |
| Pacific pelagic water strider | Halobates sericeus Eschscholtz | HEMIPTERA | Gerridae | Halobates | sericeus | Eschscholtz | |
| Pacific spider mite | Tetranychus pacificus McGregor | ACARI | Tetranychidae | Tetranychus | pacificus | McGregor | |
| Pacific tent caterpillar | Malacosoma constrictum (Hy. Edwards) | LEPIDOPTERA | Lasiocampidae | Malacosoma | constrictum | (Hy. Edwards) | |
| Pacific willow leaf beetle | Tricholochmaea decora carbo (LeConte) | COLEOPTERA | Chrysomelidae | Tricholochmaea | decora carbo | (LeConte) | |
| Packard grasshopper | Melanoplus packardii Scudder | ORTHOPTERA | Acrididae | Melanoplus | packardii | Scudder | |
| painted beauty | Vanessa virginiensis (Drury) | LEPIDOPTERA | Nymphalidae | Vanessa | virginiensis | (Drury) | |
| painted hickory borer | Megacyllene caryae (Gahan) | COLEOPTERA | Cerambycidae | Megacyllene | caryae | (Gahan) | |
| painted lady | Vanessa cardui (Linnaeus) | LEPIDOPTERA | Nymphalidae | Vanessa | cardui | (Linnaeus) | |
| painted leafhopper | Endria inimica (Say) | HEMIPTERA | Cicadellidae | Endria | inimica | (Say) | |
| painted maple aphid | Drepanaphis acerifoliae (Thomas) | HEMIPTERA | Aphididae | Drepanaphis | acerifoliae | (Thomas) | |
| pale apple leafroller | Pseudexentera mali Freeman | LEPIDOPTERA | Tortricidae | Pseudexentera | mali | Freeman | |
| pale damsel bug | Nabis capsiformis Germar | HEMIPTERA | Nabidae | Nabis | capsiformis | Germar | |
| pale juniper webworm | Aethes rutilana (Hübner) | LEPIDOPTERA | Tortricidae | Aethes | rutilana | (Hübner) | |
| pale leaf spider | Cheiracanthium mordax L. Koch | ARANEAE | Clubionidae | Cheiracanthium | mordax | L. Koch | |
| pale leafcutting bee | Megachile concinna Smith | HYMENOPTERA | Megachilidae | Megachile | concinna | Smith | |
| pale legume bug | Lygus elisus Van Duzee | HEMIPTERA | Miridae | Lygus | elisus | Van Duzee | |
| pale tussock moth | Halysidota tessellaris (J.E. Smith) | LEPIDOPTERA | Arctiidae | Halysidota | tessellaris | (J.E. Smith) | |
| pale western cutworm | Agrotis orthogonia Morrison | LEPIDOPTERA | Noctuidae | Agrotis | orthogonia | Morrison | |
| pales weevil | Hylobius pales (Herbst) | COLEOPTERA | Curculionidae | Hylobius | pales | (Herbst) | |
| palesided cutworm | Agrotis malefida Guenée | LEPIDOPTERA | Noctuidae | Agrotis | malefida | Guenée | |
| palestriped flea beetle | Systena blanda Melsheimer | COLEOPTERA | Chrysomelidae | Systena | blanda | Melsheimer | |
| pallidwinged grasshopper | Trimerotropis pallidipennis (Burmeister) | ORTHOPTERA | Acrididae | Trimerotropis | pallidipennis | (Burmeister) | |
| palm leafskeletonizer | Homaledra sabalella (Chambers) | LEPIDOPTERA | Coleophoridae | Homaledra | sabalella | (Chambers) | |
| palm mealybug | Palmicultor palmarum (Ehrhorn) | HEMIPTERA | Pseudococcidae | Palmicultor | palmarum | (Ehrhorn) | |
| palmerworm | Dichomeris ligulella Hübner | LEPIDOPTERA | Gelechiidae | Dichomeris | ligulella | Hübner | |
| pandanus mealybug | Laminicoccus pandani (Cockerell) | HEMIPTERA | Pseudococcidae | Laminicoccus | pandani | (Cockerell) | |
| pandora moth | Coloradia pandora Blake | LEPIDOPTERA | Saturniidae | Coloradia | pandora | Blake | |
| papaya fruit fly | Toxotrypana curvicauda Gerstaecker | DIPTERA | Tephritidae | Toxotrypana | curvicauda | Gerstaecker | |
| papaya mealybug | Paracoccus marginatus Williams and Granara de Willink | HEMIPTERA | Pseudococcidae | Paracoccus | marginatus | Williams and Granara de Willink | |
| parasitic grain wasp | Cephalonomia waterstoni Gahan | HYMENOPTERA | Bethylidae | Cephalonomia | waterstoni | Gahan | |
| parlatoria date scale | Parlatoria blanchardi (Targioni Tozzetti) | HEMIPTERA | Diaspididae | Parlatoria | blanchardi | (Targioni Tozzetti) | |
| parsleyworm* | Papilio polyxenes Stoll | LEPIDOPTERA | Papilionidae | Papilio | polyxenes | Stoll | *Adult called black swallowtail |
| parsnip webworm | Depressaria pastinacella (Duponchel) | LEPIDOPTERA | Oecophoridae | Depressaria | pastinacella | (Duponchel) | |
| pavement ant | Tetramorium caespitum (Linnaeus) | HYMENOPTERA | Formicidae | Tetramorium | caespitum | (Linnaeus) | |
| pea aphid | Acyrthosiphon pisum (Harris) | HEMIPTERA | Aphididae | Acyrthosiphon | pisum | (Harris) | |
| pea leaf weevil | Sitona lineatus (Linnaeus) | COLEOPTERA | Curculionidae | Sitona | lineatus | (Linnaeus) | |
| pea leafminer | Liriomyza huidobrensis (Blanchard) | DIPTERA | Agromyzidae | Liriomyza | huidobrensis | (Blanchard) | |
| pea moth | Cydia nigricana (Fabricius) | LEPIDOPTERA | Tortricidae | Cydia | nigricana | (Fabricius) | |
| pea weevil | Bruchus pisorum (Linnaeus) | COLEOPTERA | Chrysomelidae | Bruchus | pisorum | (Linnaeus) | |
| peach bark beetle | Phloeotribus liminaris (Harris) | COLEOPTERA | Curculionidae | Phloeotribus | liminaris | (Harris) | |
| peach silver mite* | Aculus fockeui (Nalepa & Trouessart) | ACARI | Eriophyidae | Aculus | fockeui | (Nalepa & Trouessart) | *Also called plum rust mite |
| peach twig borer | Anarsia lineatella Zeller | LEPIDOPTERA | Gelechiidae | Anarsia | lineatella | Zeller | |
| peachtree borer | Synanthedon exitiosa (Say) | LEPIDOPTERA | Sesiidae | Synanthedon | exitiosa | (Say) | |
| peanut burrower bug | Pangaeus bilineatus (Say) | HEMIPTERA | Cydnidae | Pangaeus | bilineatus | (Say) | |
| pear midge | Contarinia pyrivora (Riley) | DIPTERA | Cecidomyiidae | Contarinia | pyrivora | (Riley) | |
| pear plant bug | Neolygus communis (Knight) | HEMIPTERA | Miridae | Neolygus | communis | (Knight) | |
| pear psylla | Cacopsylla pyricola Foerster | HEMIPTERA | Psyllidae | Cacopsylla | pyricola | Foerster | |
| pear rust mite | Epitrimerus pyri (Nalepa) | ACARI | Eriophyidae | Epitrimerus | pyri | (Nalepa) | |
| pear sawfly | Caliroa cerasi (Linnaeus) | HYMENOPTERA | Tenthredinidae | Caliroa | cerasi | (Linnaeus) | |
| pear thrips | Taeniothrips inconsequens (Uzel) | THYSANOPTERA | Thripidae | Taeniothrips | inconsequens | (Uzel) | |
| pearleaf blister mite | Eriophyes pyri (Pagenstecher) | ACARI | Eriophyidae | Eriophyes | pyri | (Pagenstecher) | |
| pecan bud moth | Gretchena bolliana (Slingerland) | LEPIDOPTERA | Tortricidae | Gretchena | bolliana | (Slingerland) | |
| pecan carpenterworm | Cossula magnifica (Strecker) | LEPIDOPTERA | Cossidae | Cossula | magnifica | (Strecker) | |
| pecan cigar casebearer | Coleophora laticornella Clemens | LEPIDOPTERA | Coleophoridae | Coleophora | laticornella | Clemens | |
| pecan leaf casebearer | Acrobasis juglandis (LeBaron) | LEPIDOPTERA | Pyralidae | Acrobasis | juglandis | (LeBaron) | |
| pecan leaf phylloxera | Phylloxera notabilis Pergande | HEMIPTERA | Phylloxeridae | Phylloxera | notabilis | Pergande | |
| pecan leaf scorch mite | Eotetranychus hicoriae (McGregor) | ACARI | Tetranychidae | Eotetranychus | hicoriae | (McGregor) | |
| pecan leafroll mite | Aceria caryae (Keifer) | ACARI | Eriophyidae | Aceria | caryae | (Keifer) | |
| pecan nut casebearer | Acrobasis nuxvorella Neunzig | LEPIDOPTERA | Pyralidae | Acrobasis | nuxvorella | Neunzig | |
| pecan phylloxera | Phylloxera devastatrix Pergande | HEMIPTERA | Phylloxeridae | Phylloxera | devastatrix | Pergande | |
| pecan serpentine leafminer | Stigmella juglandifoliella (Clemens) | LEPIDOPTERA | Nepticulidae | Stigmella | juglandifoliella | (Clemens) | |
| pecan spittlebug | Clastoptera achatina Germar | HEMIPTERA | Cercopidae | Clastoptera | achatina | Germar | |
| pecan weevil | Curculio caryae (Horn) | COLEOPTERA | Curculionidae | Curculio | caryae | (Horn) | |
| pepper maggot | Zonosemata electa (Say) | DIPTERA | Tephritidae | Zonosemata | electa | (Say) | |
| pepper weevil | Anthonomus eugenii Cano | COLEOPTERA | Curculionidae | Anthonomus | eugenii | Cano | |
| pepper-and-salt moth | Biston betularia cognataria (Guenée) | LEPIDOPTERA | Geometridae | Biston | betularia cognataria | (Guenée) | |
| peppergrass beetle | Galeruca browni Blake | COLEOPTERA | Chrysomelidae | Galeruca | browni | Blake | |
| periodical cicada | Magicicada septendecim (Linnaeus) | HEMIPTERA | Cicadidae | Magicicada | septendecim | (Linnaeus) | |
| persimmon borer | Sannina uroceriformis Walker | LEPIDOPTERA | Sesiidae | Sannina | uroceriformis | Walker | |
| persimmon psylla | Trioza diospyri (Ashmead) | HEMIPTERA | Triozidae | Trioza | diospyri | (Ashmead) | |
| phantom hemlock looper | Nepytia phantasmaria (Strecker) | LEPIDOPTERA | Geometridae | Nepytia | phantasmaria | (Strecker) | |
| Pharaoh ant | Monomorium pharaonis (Linnaeus) | HYMENOPTERA | Formicidae | Monomorium | pharaonis | (Linnaeus) | |
| Philippine katydid | Phaneroptera furcifera Stål | ORTHOPTERA | Tettigoniidae | Phaneroptera | furcifera | Stål | |
| phlox plant bug | Lopidea davisi Knight | HEMIPTERA | Miridae | Lopidea | davisi | Knight | |
| pickerelweed borer | Bellura densa (Walker) | LEPIDOPTERA | Noctuidae | Bellura | densa | (Walker) | |
| pickleworm | Diaphania nitidalis Cramer | LEPIDOPTERA | Crambidae | Diaphania | nitidalis | Cramer | |
| pictured grasshopper | Dactylotum bicolor (Thomas) | ORTHOPTERA | Acrididae | Dactylotum | bicolor | (Thomas) | |
| pigeon fly | Pseudolynchia canariensis (Macquart) | DIPTERA | Hippoboscidae | Pseudolynchia | canariensis | (Macquart) | |
| pigeon tremex | Tremex columba (Linnaeus) | HYMENOPTERA | Siricidae | Tremex | columba | (Linnaeus) | |
| pine bark adelgid | Pineus strobi (Hartig) | HEMIPTERA | Adelgidae | Pineus | strobi | (Hartig) | |
| pine bud mite | Trisetacus pini (Nalepa) | ACARI | Phytopidae | Trisetacus | pini | (Nalepa) | |
| pine butterfly | Neophasia menapia (Felder & Felder) | LEPIDOPTERA | Pieridae | Neophasia | menapia | (Felder & Felder) | |
| pine candle moth | Exoteleia nepheos Freeman | LEPIDOPTERA | Gelechiidae | Exoteleia | nepheos | Freeman | |
| pine chafer | Anomala oblivia Horn | COLEOPTERA | Scarabaeidae | Anomala | oblivia | Horn | |
| pine colaspis | Colaspis pini Barber | COLEOPTERA | Chrysomelidae | Colaspis | pini | Barber | |
| pine conelet bug | Pappus luridus (Reuter) | HEMIPTERA | Miridae | Pappus | luridus | (Reuter) | |
| pine conelet looper | Nepytia semiclusaria (Walker) | LEPIDOPTERA | Geometridae | Nepytia | semiclusaria | (Walker) | |
| pine engraver | Ips pini (Say) | COLEOPTERA | Curculionidae | Ips | pini | (Say) | |
| pine false webworm | Acantholyda erythrocephala (Linnaeus) | HYMENOPTERA | Pamphiliidae | Acantholyda | erythrocephala | (Linnaeus) | |
| pine gall weevil | Podapion gallicola Riley | COLEOPTERA | Brentidae | Podapion | gallicola | Riley | |
| pine leaf adelgid | Pineus pinifoliae (Fitch) | HEMIPTERA | Adelgidae | Pineus | pinifoliae | (Fitch) | |
| pine needle scale | Chionaspis pinifoliae (Fitch) | HEMIPTERA | Diaspididae | Chionaspis | pinifoliae | (Fitch) | |
| pine needle sheathminer | Zelleria haimbachi Busck | LEPIDOPTERA | Yponomeutidae | Zelleria | haimbachi | Busck | |
| pine needleminer | Exoteleia pinifoliella (Chambers) | LEPIDOPTERA | Gelechiidae | Exoteleia | pinifoliella | (Chambers) | |
| pine root collar weevil | Hylobius radicis Buchanan | COLEOPTERA | Curculionidae | Hylobius | radicis | Buchanan | |
| pine root tip weevil | Hylobius assimilis Boheman | COLEOPTERA | Curculionidae | Hylobius | assimilis | Boheman | |
| pine rosette mite | Trisetacus gemmavitians Styer | ACARI | Phytopidae | Trisetacus | gemmavitians | Styer | |
| pine spittlebug | Aphrophora cribrata (Walker) | HEMIPTERA | Cercopidae | Aphrophora | cribrata | (Walker) | |
| pine tortoise scale | Toumeyella parvicornis (Cockerell) | HEMIPTERA | Coccidae | Toumeyella | parvicornis | (Cockerell) | |
| pine tube moth | Argyrotaenia pinatubana (Kearfott) | LEPIDOPTERA | Tortricidae | Argyrotaenia | pinatubana | (Kearfott) | |
| pine tussock moth | Dasychira pinicola (Dyar) | LEPIDOPTERA | Lymantriidae | Dasychira | pinicola | (Dyar) | |
| pine webworm | Pococera robustella Zeller | LEPIDOPTERA | Pyralidae | Pococera | robustella | Zeller | |
| pineapple false spider mite | Dolichotetranychus floridanus (Banks) | ACARI | Tenuipalpidae | Dolichotetranychus | floridanus | (Banks) | |
| pineapple mealybug | Dysmicoccus brevipes (Cockerell) | HEMIPTERA | Pseudococcidae | Dysmicoccus | brevipes | (Cockerell) | |
| pineapple scale | Diaspis bromeliae (Kerner) | HEMIPTERA | Diaspididae | Diaspis | bromeliae | (Kerner) | |
| pineapple tarsonemid | Steneotarsonemus ananas (Tryon) | ACARI | Tarsonemidae | Steneotarsonemus | ananas | (Tryon) | |
| pineapple weevil | Metamasius ritchiei Marshall | COLEOPTERA | Curculionidae | Metamasius | ritchiei | Marshall | |
| pink bollworm | Pectinophora gossypiella (Saunders) | LEPIDOPTERA | Gelechiidae | Pectinophora | gossypiella | (Saunders) | |
| pink scavenger caterpillar | Pyroderces rileyi (Walsingham) | LEPIDOPTERA | Cosmopterigidae | Pyroderces | rileyi | (Walsingham) | |
| pink sugarcane mealybug | Saccharicoccus sacchari (Cockerell) | HEMIPTERA | Pseudococcidae | Saccharicoccus | sacchari | (Cockerell) | |
| pinkstriped oakworm | Anisota virginiensis (Drury) | LEPIDOPTERA | Saturniidae | Anisota | virginiensis | (Drury) | |
| pinkwinged grasshopper | Atractomorpha sinensis Bolivar | ORTHOPTERA | Pyrgomorphidae | Atractomorpha | sinensis | Bolivar | |
| pinon cone beetle | Conophthorus edulis Hopkins | COLEOPTERA | Curculionidae | Conophthorus | edulis | Hopkins | |
| pinyon ips | Ips confusus (LeConte) | COLEOPTERA | Curculionidae | Ips | confusus | (LeConte) | |
| pinyon needle scale | Matsucoccus acalyptus (Herbert) | HEMIPTERA | Margarodidea | Matsucoccus | acalyptus | (Herbert) | |
| pinyon spindlegall midge | Pinyonia edulicola Gagné | DIPTERA | Cecidomyiidae | Pinyonia | edulicola | Gagné | |
| pipevine swallowtail | Battus philenor (Linnaeus) | LEPIDOPTERA | Papilionidae | Battus | philenor | (Linnaeus) | |
| pistol casebearer | Coleophora malivorella Riley | LEPIDOPTERA | Coleophoridae | Coleophora | malivorella | Riley | |
| pitch mass borer | Synanthedon pini (Kellicott) | LEPIDOPTERA | Sesiidae | Synanthedon | pini | (Kellicott) | |
| pitch pine tip moth | Rhyacionia rigidana (Fernald) | LEPIDOPTERA | Tortricidae | Rhyacionia | rigidana | (Fernald) | |
| pitch twig moth | Retinia comstockiana (Fernald) | LEPIDOPTERA | Tortricidae | Retinia | comstockiana | (Fernald) | |
| pitch-eating weevil | Pachylobius picivorus (Germar) | COLEOPTERA | Curculionidae | Pachylobius | picivorus | (Germar) | |
| pitcherplant mosquito | Wyeomyia smithii (Coquillett) | DIPTERA | Culicidae | Wyeomyia | smithii | (Coquillett) | |
| plains false wireworm | Eleodes opacus (Say) | COLEOPTERA | Tenebrionidae | Eleodes | opacus | (Say) | |
| plains lubber grasshopper | Brachystola magna (Girard) | ORTHOPTERA | Romaleidae | Brachystola | magna | (Girard) | |
| plaster beetle | Cartodere constricta (Gyllenhal) | COLEOPTERA | Lathridiidae | Cartodere | constricta | (Gyllenhal) | |
| plum curculio | Conotrachelus nenuphar (Herbst) | COLEOPTERA | Curculionidae | Conotrachelus | nenuphar | (Herbst) | |
| plum gouger | Coccotorus scutellaris (LeConte) | COLEOPTERA | Curculionidae | Coccotorus | scutellaris | (LeConte) | |
| plum leafhopper | Macropsis trimaculata (Fitch) | HEMIPTERA | Cicadellidae | Macropsis | trimaculata | (Fitch) | |
| plum rust mite* | Aculus fockeui (Nalepa & Trouessart) | ACARI | Eriophyidae | Aculus | fockeui | (Nalepa & Trouessart) | *Also called peach silver mite |
| plum webspinning sawfly | Neurotoma inconspicua (Norton) | HYMENOPTERA | Pamphiliidae | Neurotoma | inconspicua | (Norton) | |
| plumeria borer | Lagocheirus undatus (Voet) | COLEOPTERA | Cerambycidae | Lagocheirus | undatus | (Voet) | |
| plumeria whitefly | Paraleyrodes perseae (Quaintance) | HEMIPTERA | Aleyrodidae | Paraleyrodes | perseae | (Quaintance) | |
| poinciana looper | Pericyma cruegeri (Butler) | LEPIDOPTERA | Noctuidae | Pericyma | cruegeri | (Butler) | |
| polyphemus moth | Antheraea polyphemus (Cramer) | LEPIDOPTERA | Saturniidae | Antheraea | polyphemus | (Cramer) | |
| ponderosa pine bark borer | Canonura princeps (Walker) | COLEOPTERA | Cerambycidae | Canonura | princeps | (Walker) | |
| ponderosa pine cone beetle* | Conophthorus ponderosae Hopkins | COLEOPTERA | Curculionidae | Conophthorus | ponderosae | Hopkins | *Also called lodgepole cone beetle and sugar pine cone beetle |
| ponderosa pine coneworm | Dioryctria auranticella (Grote) | LEPIDOPTERA | Pyralidae | Dioryctria | auranticella | (Grote) | |
| ponderosa pine seedworm | Cydia piperana Kearfott | LEPIDOPTERA | Tortricidae | Cydia | piperana | Kearfott | |
| ponderosa pine tip moth | Rhyacionia zozana (Kearfott) | LEPIDOPTERA | Tortricidae | Rhyacionia | zozana | (Kearfott) | |
| poplar borer | Saperda calcarata Say | COLEOPTERA | Cerambycidae | Saperda | calcarata | Say | |
| poplar leaffolding sawfly | Phyllocolpa bozemani (Cooley) | HYMENOPTERA | Tenthredinidae | Phyllocolpa | bozemani | (Cooley) | |
| poplar petiolegall aphid | Pemphigus populitransversus Riley | HEMIPTERA | Aphididae | Pemphigus | populitransversus | Riley | |
| poplar tentmaker | Clostera inclusa (Hübner) | LEPIDOPTERA | Notodontidae | Clostera | inclusa | (Hübner) | |
| poplar twig gall aphid | Pemphigus populiramulorum Riley | HEMIPTERA | Aphididae | Pemphigus | populiramulorum | Riley | |
| poplar twiggall fly | Hexomyza schineri (Giraud) | DIPTERA | Agromyzidae | Hexomyza | schineri | (Giraud) | |
| poplar vagabond aphid | Mordvilkoja vagabunda (Walsh) | HEMIPTERA | Aphididae | Mordvilkoja | vagabunda | (Walsh) | |
| poplar-and-willow borer | Cryptorhynchus lapathi (Linnaeus) | COLEOPTERA | Curculionidae | Cryptorhynchus | lapathi | (Linnaeus) | |
| portulaca leafmining weevil | Hypurus bertrandi Perris | COLEOPTERA | Curculionidae | Hypurus | bertrandi | Perris | |
| potato aphid | Macrosiphum euphorbiae (Thomas) | HEMIPTERA | Aphididae | Macrosiphum | euphorbiae | (Thomas) | |
| potato flea beetle | Epitrix cucumeris (Harris) | COLEOPTERA | Chrysomelidae | Epitrix | cucumeris | (Harris) | |
| potato leafhopper | Empoasca fabae (Harris) | HEMIPTERA | Cicadellidae | Empoasca | fabae | (Harris) | |
| potato psyllid* | Bactericera cockerelli (Sulc) | HEMIPTERA | Triozidae | Bactericera | cockerelli | (Sulc) | *Also called tomato psyllid |
| potato scab gnat | Pnyxia scabiei (Hopkins) | DIPTERA | Sciaridae | Pnyxia | scabiei | (Hopkins) | |
| potato stalk borer | Trichobaris trinotata (Say) | COLEOPTERA | Curculionidae | Trichobaris | trinotata | (Say) | |
| potato stem borer | Hydraecia micacea (Esper) | LEPIDOPTERA | Noctuidae | Hydraecia | micacea | (Esper) | |
| potato tuberworm | Phthorimaea operculella (Zeller) | LEPIDOPTERA | Gelechiidae | Phthorimaea | operculella | (Zeller) | |
| poultry bug | Haematosiphon inodorus (Dugès) | HEMIPTERA | Cimicidae | Haematosiphon | inodorus | (Dugès) | |
| poultry bug | Haematosiphon inodorus (Duges) | HEMIPTERA | Cimicidae | Haematosiphon | inodorus | (Dugès) | |
| poultry house moth | Niditinea fuscella (Linnaeus) | LEPIDOPTERA | Tineidae | Niditinea | fuscella | (Linnaeus) | |
| powderpost bostrichid | Amphicerus cornutus (Pallas) | COLEOPTERA | Bostrichidae | Amphicerus | cornutus | (Pallas) |