INSECT DIAGNOSTIC LABORATORY, Department of Entomology, Cornell University
Insect Diagnostic Lab Factsheets
Click on any title in the alphabetical list below to download a pdf file or read the factsheet in your browser (depending how your browser is set to open pdfs -- if it opens in the browser you can use Save As and choose pdf, if you want to download the file to keep a copy).
At the bottom of this page these same factsheets are grouped by topic (
Household/Indoor;
Biting/Stinging;
Wood/Lumber;
Trees/Shrubs;
Vegetable/Garden;
Houseplants;
Outdoor/Miscellaneous).
Return to Main Insect Diagnostic Lab page
Ants in Houses Aphids Apple Maggot Aquatic Insects Asian Lady BeetleAsian Longhorned Beetle (includes links to other websites)
Asparagus Beetles Bagworms Bed Bugs These are a few examples received at the IDL, some missing an antenna or legs but still identifiable, when examined under the microscope.
BED BUG
(less than 1/4 inch long)
 |
BED BUG (nymph)
(less than 1/8 inch)
 |
SPIDER BEETLE
(less than 1/8 inch)
very round (not flat) |
BOOKLOUSE
(less than 1/16 inch)
See "Booklice" in list |
Bees (a link to Cornell's Dyce Laboratory)
Beetles in Flour, Grains, and Other Stored FoodsBeetles Infesting Woolens Beneficial Insects - Nature's Pest Control Parasitoids (a large poster: download pdf and zoom in to see closeup photos)
Black-legged tickBooklice Boxelder Bug Brown Marmorated Stink Bug (links to other websites)
Cabbage Maggot Carpenter Ants (factsheet from Cornell Cooperative Extension of Suffolk County, NY)
Carpenter Bees
Carpet Beetles (Dermestids) -- see:
Beetles Infesting Woolens and
Larder Beetle
CentipedesCigarette and Drugstore Beetles Clothes Moths Cockroaches Colorado Potato Beetle Deer Tick Drain Flies Emerald Ash Borer (links to other websites)
European Chafer European Earwig Fall Webworm
FirebratsFirewood Insects Flea Beetles Fleas Fourlined Plant Bug Fruit FliesGalls on Plants Gypsy Moth Hemlock Woolly Adelgid (links to other websites)
Hornets and Wasps (link to Cornell's Dyce Laboratory)
Horntails or Wood Wasps Imported Cabbageworm (Cabbage White Butterfly)
Imported Willow Leaf Beetle Indian Meal Moth Insects and Firewood Lady Beetles in Homes (Ladybugs; Ladybird beetles)
Multicolored Asian Lady Beetle Larder Beetle Magnolia ScaleManaging Home Vegetable Garden Pests Mealybugs on Houseplants Mexican Bean Beetle Millipedes, Sowbugs, Pillbugs, and CentipedesMoth FliesMountain Ash Sawfly Oak Skeletonizer Parasitoid Insects
Pear Thrips Plant Galls Powder Post Beetles Pseudoscorpions Rhubarb Curculio Sawtoothed Grain Beetle Scales on Houseplants Silverfish and Firebrats Snow-FleasSowbugs and PillbugsSpiders Springtails Squash Vine Borer Stinging Insects (Bees, Wasps, Hornets, Yellowjackets); a link to Cornell's Dyce Laboratory
Striped Cucumber Beetle Sugar maple and the Pear Thrips Termites (factsheet from Cornell Cooperative Extension of Suffolk County, NY)
Tomato Hornworm Vegetable Garden Pests (Managing Home Vegetable Garden Pests)
Viburnum Leaf Beetle Western Conifer Seed Bug
Factsheets by Topic
Household & Indoor:
Ants in Houses;
Bed Bugs;
Beetles in Stored Foods;
Beetles Infesting Woolens;
Booklice;
Boxelder Bug;
Brown Marmorated Stink Bug;
Carpenter Ants;
Carpenter Bees;
Cigarette and Drugstore Beetles;
Clothes Moths;
Cockroaches;
Deer Tick (Black-legged tick);
Drain Flies or Moth Flies;
European Earwig;
Firewood Insects;
Fleas;
Fruit Flies;
Indian Meal Moth;
Lady Beetles in Homes;
Larder Beetle;
Millipedes, Sowbugs, Pillbugs, and Centipedes;
Multicolored Asian Lady Beetle;
Powder Post Beetles;
Pseudoscorpions;
Sawtoothed Grain Beetle;
Silverfish and Firebrats;
Spiders;
Springtails;
Stinging Insects;
Termites;
Western Conifer Seed Bug
Biting & Stinging:
Bed Bugs;
Deer Tick (Black-legged tick);
Fleas;
Spiders;
Stinging Insects (including Bees, Wasps, Hornets, and Yellowjackets)
Wood & Lumber:
Carpenter Ants;
Carpenter Bees;
Firewood Insects;
Horntails or Wood Wasps;
Powder Post Beetles;
Termites
Trees & Shrubs:
Aphids;
Apple Maggot;
Asian Longhorned Beetle;
Bagworms;
Boxelder Bug;
Brown Marmorated Stink Bug;
Emerald Ash Borer;
Fall Webworm;
Firewood Insects;
Galls on Plants;
Gypsy Moth;
Hemlock Woolly Adelgid;
Horntails or Wood Wasps;
Imported Willow Leaf Beetle;
Magnolia Scale;
Mountain Ash Sawfly;
Oak Skeletonizer;
Pear Thrips and Sugar Maple;
Viburnum Leaf Beetle;
Western Conifer Seed Bug
Vegetables & Gardens:
Managing Home Vegetable Garden Pests;
Aphids;
Asparagus Beetles;
Beneficial Insects;
Brown Marmorated Stink Bug;
Cabbage Maggot;
Colorado Potato Beetle;
Flea Beetles;
Fourlined Plant Bug;
Imported Cabbageworm;
Mexican Bean Beetle;
Rhubarb Curculio;
Squash Vine Borer;
Striped Cucumber Beetle;
Tomato Hornworm
Houseplants:
Aphids;
Mealybugs;
Scale Insects
Outdoor & Miscellaneous:
Aquatic Insects;
Beneficial Insects;
Brown Marmorated Stink Bug;
Deer Tick;
European Chafer;
Galls on Plants;
Millipedes, Sowbugs, Pillbugs, and Centipedes;
Multicolored Asian Lady Beetle;
Parasitoid Insects;
Pseudoscorpions;
Snow-Fleas;
Spiders;
Springtails;
Stinging Insects;
Western Conifer Seed Bug
Photos in the IDL banner are © 2012 by Jason J. Dombroskie, Ph.D. (IDL Coordinator & Diagnostician).
From left to right: Alder flea beetle - adults (Chrysomelidae: Altica ambiens); Larder beetle - larva (Dermestidae: Dermestes lardarius); Spotted tussock moth - caterpillar (Erebidae, or Arctiidae: Lophocampa maculata); Indian meal moth - adult (Pyralidae: Plodia interpunctella); Cornfield ant (Formicidae: Lasius sp.) with Scale insects (Coccidae: Coccus sp.); European sowbug, or Common woodlouse - an Isopod, not an insect (Oniscidae: Oniscus asellus); Multicolored Asian lady beetle - adults (Coccinellidae: Harmonia axyridis); The Herald (moth) - caterpillar (Erebidae, or Noctuidae: Scoliopteryx libatrix).
NOTE: If any pdf or link does not work, please notify IDLDiagnosticLab@cornell.edu
and if the download is not functioning, a pdf copy can be emailed to you.
Web page last updated 12/12/12.
