Information on many arthropods of importance or interest in Colorado has been developed by the Colorado State Extension Entomology program. Many of these are treated in Extension Fact Sheets that can be accessed at the Colorado Extension website Those listed below are indicated by their publication number.
A couple of sheets on exotic insects not currently found in Colorado are listed, preceded by +. The remaining publications are a new series - Colorado Arthropods of Interest - and are indicated by *.
The currently available sheets are listed below, organized by taxa. Additional sheets will be developed in the future.
| •Arachnida (Arachnids) |
Coleoptera (Beetles) cont. |
Araneae (Spiders) |
* Prionus Longhorns |
| 5.512 Spiders in the Home |
* Arhopalus asperatus- A Common Longhorned Beetle |
| * Catfaced Spider |
* Locust Borer |
| * Banded Garden Spider |
* Blackhorned Pine Borer |
| 5.605 Western Widow |
* Pole Borer |
| * Dysdera crocata (“Roly-poly Hunter”) |
* Cherry Curculio |
| * Funnel Weaver Spiders |
* Hollyhock Weevil |
| 5.607 Brown Recluse in Colorado: |
* European Elm Flea Weevil |
| * Yellow-legged Sac Spiders |
5.528 Mountain Pine Beetle |
| * Jumping Spiders |
5.558 Ips Beetles |
| * Tarantulas of Colorado |
5.500 Alfalfa Weevil |
| Acari (Mites and Ticks) |
5.585 Sunflower Stem Weevil Management |
| 5.505 Clover and other Mites of Turfgrass |
5.551 Root Weevils |
| 5.507 Spider Mites |
5.606 White Pine Weevil |
| 5.578 Mites in Wheat |
5.516 White Grubs and Billbugs |
| 5.555 Spider Mites in Corn |
5.601 Japanese Beetle |
| 5.593 Ticks and Tick-borne Diseases in Colorado |
* Tenlined June Beetle |
| Solifugae (Sunspiders) |
* Bumble Flower Beetle |
| 5.589 Sunspiders (Windscorpions) |
* Southwestern Stag Beetle |
| Scorpiones (Scorpions) |
* Clerid (Checkered) Beetles |
| * Scorpions of Colorado |
5.594 Lady Beetles |
| Opiliones (Daddylonglegs, Harvestmen) |
* Pleasing Fungus Beetle |
| * Daddylonglegs |
5.524 Blister Beetles in Forage Crops |
| Pseudoscorpiones (Pseudoscorpions) |
* Black Blister Beetle |
| * Pseudoscorpions |
* Soldier Beetles |
| •Crustacea (Crustaceans) |
* Burying Beetles |
| * Pillbug |
* Fireflies |
| * Longtailed Tadpole Shrimp |
Hymenoptera (Bees, Wasps, Ants, Bees, Sawflies, Horntails) |
| •Chilopoda (Centipedes) |
5.518 Ants in the Home |
| * Common Desert Centipede (Tiger Centipede) |
5.554 Carpenter Ants |
| * House Centipede |
* Harvester Ants |
| •Diplopoda (Millipedes) |
5.611 European Paper Wasp |
| * Millipedes of Colorado |
* Baldfaced Hornet |
| * Duff Millipede |
* Yellowjackets |
| •Hexapoda (Non-entognathous hexapods) |
* Black-and-yellow Mud Dauber |
| Collembola (Springtails) |
* Pseneo punctatus - Leafhopper Hunting Wasp |
| 5.602 Springtails |
* Pemphredon Wasp |
| Protura (Proturans) |
* Tarantula Hawks |
| Diplura (Diplurans) |
* Pelecnid Wasp |
| •Hexapoda (Insects) |
* Rough Bulletgall Wasp |
| Thysanura (Silverfish and Firebrats) |
5.576 Leafcutter Bees |
| * Silverfish |
* Wool Carder Bee |
| Microcoryphia (Jumping Bristletails) |
* Bumble Bees |
| Ephemeroptera (Mayflies) |
5.585 Brownheaded Ash Sawfly |
| Odonata (Dragonflies and Damselflies) |
* Imported Currantworm |
| Plecoptera (Stoneflies) |
* Elm Leafminer |
| Phasmatodea |
5.560 Pear Slugs |
| * Walkingsticks of Colorado |
5.604 Pigeon Tremex and Giant Ichneumon Wasp |
| Orthoptera (Grasshoppers, Crickets, Katydids and Relatives) |
* Sirex Horntails |
| 5.536 Grasshopper Control in Gardens and Small Acreages |
Trichoptera (Caddisflies) |
| 5.535 Grasshoppers in Field Crops |
Lepidoptera (Moths, Skippers, Butterflies) |
| * Broadwinged Katydid |
5.504 Attracting Butterflies to the Garden |
| * Jerusalem Cricket |
* Colorado Hairstreak (State Insect of Colorado) |
| Dermaptera (Earwigs) |
* Twotailed Swallowtail |
| 5.533 European Earwig |
* Black Swallowtail/Parsleyworm |
| Mantodea (Mantids) |
* Painted Lady |
| 5.510 Mantids of Colorado |
* Mourning Cloak |
| * European Mantid |
5.508 Caterpillars in Field Crops: I |
| Blattodea (Cockroaches) |
5.564 Caterpillars in Field Crops: II |
| 5.553 Cockroaches |
5.565 Caterpillars in Field Crops: III |
| Isoptera (Termites) |
5.577 Caterpillars in Small Grains |
| 5.532 Termites |
* Linden Looper |
| Phthiraptera (Lice) |
5.599 Clothes Moths: Identification and Control in the Home |
| Psocoptera (Booklice and Barklice) |
5.598 Indian Meal Moth |
| * Booklice |
5.597 Miller Moths |
| Hemiptera |
* Questions and Answers about Miller Moths |
| 5.574 Bat Bugs, Bed Bugs and Relatives |
5.581 Tobacco (Geranium) Budworm |
| 5.609 Squash Bug: Management in Home Gardens |
5.538 Western Bean Cutworm: |
| * Harlequin Bug |
5.603 Armyworms |
| * Rough Stink Bugs |
5.517 Hornworms and Hummingbird Moths |
| 5.522 Boxelder Bugs |
* Achemon Sphinx |
| * Goldenrain Tree Bug |
* Leafy Spurge Hawk Moth |
| 5.588 Conifer Seed Bugs |
* Whitelined Sphinx |
| 5.603 False Chinch Bugs |
5.566 Peach Tree Borer |
| 5.575 Black Grass Bugs |
* Lilac Ash Borer |
| * Ambush Bug |
5.580 Snailcase Bagworm |
| * Masked Hunter |
5.583 Tent-making Caterpillars |
| * Zelus Luridus |
5.542 Douglas-fir Tussock Moth |
| * Water Striders |
* American Dagger Moth |
| 5.608 Leafhoppers on Lawns |
* Banded Woollybear |
| 5.587 Greenhouse Whitefly |
* Saltmarsh Caterpillar |
| 5.540 Potato or Tomato Psyllids |
+Gypsy Moth |
| 5.590 Cicadas |
* Io Moth |
| 5.513 Oystershell Scale |
* Cecropia Moth |
| * Poplar Scale |
* Polyphemus Moth |
| 5.514 Scale Insects affecting Conifers |
* Black Witch |
| * Pinyon Scale |
5.537 Stalk Borers in Colorado Field Corn |
| 5.534 Cooley Spruce Galls |
5.529 Pine Tip Moths |
| 5.511 Aphids on Shade Trees and Ornamentals |
5.591 Zimmerman Pine Moth |
| 5.531 Aphids in Alfalfa |
5.543 Western Spruce Budworm |
| 5.568 Aphids in Small Grains |
5.567 Ponderosa Pine Budworm |
| Thysanoptera (Thrips) |
* Mexican Jumping Bean Moth |
| Neuroptera (Lacewings, Antlions, Dobsonflies, and Allies) |
Diptera (Flies, Gnats, Midges, Mosquitoes, etc.) |
| * Dobsonfly (Texas Dobsonfly) |
5.502 Flies in the Home |
| * Wasp Mantidfly |
* Cluster Flies |
| Coleoptera (Beetles) |
5.582 Biting Flies |
| 5.549 Carpet Beetles |
* Moth Flies |
| * Dermestid Beetles |
5.584 Fungus Gnats as Houseplant and Indoor Pests |
| * Spider Beetles |
* March Flies |
| * Giant Water Scavenger Beetle |
* Crane Flies |
| * Sidewalk Tiger Beetle |
5.579 Poplar Twiggall Fly |
| 5.570 Western Corn Rootworm |
* Ceroxys latiusculus - A Picture-winged Fly |
| * Checkered Melon Beetle |
* Small Fruit Flies (Vinegar Flies) |
| 5.521 Elm Leaf Beetles |
* Rodent Bots |
| * Rubber Rabbitbrush Beetle |
Strepsiptera (Twisted-wing Parasites) |
| * Golden Tortoise Beetle |
Siphonaptera (Fleas) |
| 5.592 Flea Beetles |
5.600 Fleas and Plague |
| * Apple Flea Beetle |
•Non-Arthropods |
| * Sumac Flea Beetle |
5.515 Slugs |
| +Emerald Ash Borer |
* Brown Garden Snail |
| * Milkweed Longhorns |
* Nightcrawlers |
| +Asian Longhorned Beetle |
5.609 Weird Worms |
| * Pine Sawyers |
5.573 Insect Control: Insect Parasitic Nematodes |
| * Ponderous Borer |
* Fly Fungus |
