Forum

Insect-Plant Food Webs Could Provide New Clues for Pest Management. 
Graciela R. Valladares and Adriana Salvo . . . . 539

 

Physiological and Chemical Ecology

Factor from Swamp Water Induces Hatching in Eggs of Anopheles diluvialis (Diptera: Culicidae) Mosquitoes. 
Truls Jensen, David A. Carlson, and Donald R. Barnard . . . . 545

Chemically-Mediated Attraction of Ichneumon (=Pterocormus) promissorius (Hymenoptera: Ichneumonidae) Males by Females. 
Darryl K. Jewett and James E. Carpenter . . . . 551

Active Spaces of Pheromone Traps for Plodia interpunctella (Lepidoptera: Pyralidae) in Enclosed Environments.
R. W. Mankin, R. T. Arbogast, P. E. Kendra, and D. K. Weaver . . . . 557

Ovipositional Response of Tobacco Hornworm Moths (Lepidoptera: Sphingidae) to Tobacco Plants Grown Under Elevated Levels of Ozone. 
D. Michael Jackson, A. S. Heagle, and R.V.W. Eckel . . . . 566

Temperature Related, Stage-Specific Development and Fecundity of Colonizing and Root-Feeding Morphs of Pemphigus populitransversus (Homoptera: Aphididae) on Brassica. 
T. A. Royer, J. V. Edelson, and M. K. Harris . . . . 572

Ecology of Mountain Pine Beetle (Coleoptera: Scolytidae) Cold Hardening in the Intermountain West. 
B. J. Bentz and D. E. Mullins . . . . 577

Influence of Host Plant Damage on the Host-Finding Behavior of Mamestra brassicae (Lepidoptera: Noctuidae). 
Julio C. Rojas . . . . 588

Community and Ecosystem Ecology 

Allen-Vac: An Internal Collection Bag Retainer Allows for Snag-Free Arthropod Sampling in Woody Scrub. 
Kendall H. Osborne and William W. Allen . . . . 594

Spatial and Temporal Distribution of Ground Beetle (Coleoptera: Carabidae) Assemblages in Riparian Strips and Adjacent Wheat Fields. 
B. Wade French and Norman C. Elliott . . . . 597

Population Ecology

Aggregation Sites for Adult European Corn Borers (Lepidoptera: Crambidae): A Comparison of Prairie and Non-Native Vegetation. 
John M. Pleasants and Royce J. Bitzer . . . . 608

Spatial Distribution of Nests of Nasutitermes sp. (Isoptera: Termitidae) in a Cerrado Area in Southeastern Brazil. 
Maria Luisa Tunes Buschini . . . . 618

Oviposition Site Selection by the Predatory Midge Aphidoletes aphidimyza (Diptera: Cecidomyiidae). 
Eric Lucas and Jacques Brodeur . . . . 622

Preference Variation in the Polyphagous Tiger Swallowtail Butterfly (Lepidoptera: Papilionidae). 
J. L. Bossart and J. Mark Scriber . . . . 628

Bark and Ambrosia Beetle (Coleoptera: Scolytidae) Responses to Volatiles from Aging Loblolly Pine Billets. 
C.A.H. Flechtmann, M. J. Dalusky, and C. W. Berisford . . . . 638

Attraction of Ambrosia Beetles (Coleoptera: Scolytidae) to Different Tropical Pine Species in Brazil. 
C.A.H. Flechtmann, A.L.T. Ottati, and C. W. Berisford . . . . 649

Simulation of Topographic and Daily Variation in Colony Activity of Pogonomyrmex occidentalis(Hymenoptera: Formicidae) Using a Soil Temperature Model. 
Thomas O. Crist and Jennifer A. Williams . . . . 659

Inherited Sterility in Codling Moth (Lepidoptera: Tortricidae): Effect of Substerilizing Doses of Radiation on Field Competitiveness. 
S. Bloem, K. A. Bloem, J. E. Carpenter, and C. O. Calkins . . . . 669

Genetic Structure of the Bovicola ovis (Mallophaga: Trichodectidae) in Southwestern Australia. 
Alan J. Lymbery and Ian R. Dadour . . . . 675

Effects of Habitat Patch Size and Temperature on the Distribution and Abundance of Ground Beetles (Coleoptera: Carabidae) in an Old Field. 
Thomas O. Crist and Robert G. Ahern . . . . 681

Transition of Diapause Attributes in the Hybrid Zone of the Two Morphological Types of Psacothea hilaris (Coleoptera: Cerambycidae). 
Yoshinori Shintani and Yukio Ishikawa . . . . 690

Physiological Not Behavioral Adaptations of Leafminers to a Resistant Host Plant: A Natural Selection Experiment. 
D. J. Hawthorne . . . . 696

Pest Management and Sampling

Effect of Alfalfa-Grass Intercrops on Insect Populations. 
Todd A. Degooyer, Larry P. Pedigo, and Marlin E. Rice . . . . 703

Predictability and Measurability of Bacillus thuringiensis Efficacy Against Spruce Budworm (Lepidoptera: Tortricidae). 
B. J. Cooke and J. Regniere . . . . 711

Quadrat Sample Precision and Cost with a High-Vacuum Insect Sampling Machine in Cotton Ecosystems. 
Joe Ellington and Morris Southward . . . . 722

Biological Control

Effects of an Artificial Diet and Varied Environmental Conditions on Longevity of Coeloides pissodis(Hymenoptera: Braconidae), a Parasitoid of Dendroctonus frontalis (Coleoptera: Scolytidae). 
Patrick L. Mathews and Frederick M. Stephen . . . . 729

Seasonal Abundance of Spider Mites and Their Predators on Red Raspberry in Quebec, Canada.
Michele Roy, Jacques Brodeur, and Conrad Cloutier . . . . 735 

Aspects of the Biology of Hyssopus pallidus (Hymenoptera: Eulophidae), a Parasitoid of the Codling Moth (Lepidoptera: Olethreutidae). 
Tania Zaviezo and Nick Mills . . . . 748

Host Location by House Fly (Diptera: Muscidae) Parasitoids in Poultry Manure at Different Moisture Levels and Host Densities. 
Christopher J. Geden . . . . 755

Microbial Agents Bacillus thuringiensis ssp. israelensis and Bacillus sphaericus Suppress Eutrophication, Enhance Water Quality, and Control Mosquitoes in Microcosms. 
Tianyun Su and Mir S. Mulla . . . . 761

Population Dynamics of Three Coccinellids in Flue-Cured Tobacco and Functional Response ofHippodamia convergens (Coleoptera: Coccinellidae) Feeding on Tobacco Aphids (Homoptera: Aphididae). 
M. Leonard Wells and Robert M. McPherson . . . . 768