Arthropods of Colorado

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 CSU Extension Insect Publications. Those listed below are indicated by their publication number. The currently available sheets are listed below, organized by taxa. Additional sheets will be developed in the future.

  • Fact 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 –

Arachnida (Arachnids)

Araneae (Spiders)

5.512 Spiders in the Home

– Catfaced Spider

– Whitebacked Garden Spider

5.605 Western Widow

– Dysdera crocata (“Roly Poly Hunter”)

– Funnel Weaver Spiders

– Barn Funnel Weaver

– Triangulate Cobweb Spider

– American House Spider

 

5.607 Brown Recluse in Colorado

– Yellow-Legged Sac Spiders

– Parson Spiders

– Jumping Spiders

– Tarantulas of Colorado

Acari (Mites and Ticks)

5.505 Clover and other Mites of Turfgrass

Bird Mites as a Pest Within Homes in Colorado

5.507 Spider Mites

5.578 Mites in Wheat

5.555 Spider Mites in Corn

5.593 Ticks and Tick-borne Diseases in Colorado

Solifugae (Windscorpions/Sunspiders)

5.589 Sunspiders (Windscorpions)

Scorpiones (Scorpions)

–Scorpions

Opiliones (Daddylonglegs, Harvestmen)

– Daddylonglegs

Pseudoscorpiones (Pseudoscorpions)

– Pseudoscorpions

Crustacea (Crustaceans)

– Pillbug

– Longtailed Tadpole Shrimp

Chilopoda (Centipedes)

– Common Desert Centipede (Tiger Centipede)

– House Centipede

Diplopoda (Millipedes)

– Millipedes of Colorado

– Duff Millipede

Hexapoda (Non-entognathous hexapods)

Collembola (Springtails)

5.602 Springtails

Diplura (Diplurans)

Protura (Proturans)

Hexapoda (Insects)

Blattodea (Cockroaches and Termites)

– 5.553 Cockroaches

– 5.532 Termites

Coleoptera (Beetles)

5.549 Dermestid Beetles

– Spider Beetles

– Giant Water Scavenger Beetle

– Sidewalk Tiger Beetle

5.570 Western Corn Rootworm

– Checkered Melon Beetle

5.521 Elm Leaf Beetles

– Knab’s Willow Leaf Beetle/Cottonwood Leaf Beetle

– Rubber Rabbitbrush Beetle

– Golden Tortoise Beetle

       – Argus Tortoise Beetle

5.592 Flea Beetles

– Apple Flea Beetle

– Sumac Flea Beetle

– Eyed Elators

5.620 Recognizing Wood Boring Insects of Ash Trees in Colorado

– Milkweed Longhorns

        – Gambel oak borer

        – 5.526 Insecticides Used to Control Emerald Ash Borer on Residential Shade Trees

+ Asian Longhorned Beetle

– Pine Sawyers

– Ponderous Borer

– Prionus Longhorns

– Arhopalus asperatus-A Common Longhorned Beetle

– Locust Borer

– Blackhorned Pine Borer

– Pole Borer

– Cherry Curculio

– Hollyhock Weevil

– European Elm Flea Weevil

5.528 Mountain Pine Beetle

Spruce Beetle: An Agent of Subalpine Change (CSFS Quick Guide)

5.558 Ips Beetles

Fir Engraver Beetle (CSFS Quick Guide)

5.500 Alfalfa Weevil

– Sunflower Headclipping Weevil

5.585 Sunflower Stem Weevil Management

5.551 Root Weevils

5.606 White Pine Weevil

5.516 White Grubs and Billbugs

5.601 Japanese Beetle

– Tenlined June Beetle

– Bumble Flower Beetle

– Southwestern Stag Beetle

– Clerid Beetles

5.594 Lady Beetles

– Pleasing Fungus Beetle

5.524 Blister Beetles in Forage Crops

– Black Blister Beetle

       – Clematis Blister Beetle

– Soldier Beetles

– Burying Beetles

Dermaptera (Earwigs)

5.533 European Earwig

Diptera (Flies, Gnats, Midges, Mosquitoes, etc.)

5.502 Flies in the Home

5.618 Cluster Flies and other “Winter Flies”

5.582 Biting Flies

– Moth Flies

– Phorid Flies

5.584 Fungus Gnats as Houseplant and Indoor Pests

– March Flies

– Crane Flies

5.579 Poplar Twiggall Fly

– Spinach Leafminers

– Ceroxys latiusculus – A Picture-winged Fly

5.596 Spotted-wing Drosophila: Management in Home Plantings

– Small Fruit Flies (Vinegar Flies)

– Narcissus Bulb Fly

– Rodent Bots

Ephemeroptera (Mayflies)

Hemiptera (True Bugs, Aphids, Scale Insects, Leafhoppers, Whiteflies, etc.)

5.574 Bat Bugs, Bed Bugs and Relatives

5.625 Bed Bug Lookalikes (Bat Bugs, Swallow Bugs)

Summary of Features Used to Separate Colorado Cimicids

5.609 Squash Bug: Management in Home Gardens

5.617 Harlequin Bug

– Rough Stink Bugs

5.522 Boxelder Bugs

– Goldenrain Tree Bug

5.588 Conifer Seed Bugs

5.619 Elm Seed Bug: A New Nuisance Pest in Colorado Homes

5.603 False Chinch Bugs

5.575 Black Grass Bugs

Hemiptera continued... (True Bugs, Aphids, Scale Insects, Leafhoppers, Whiteflies, etc.)

– Ambush Bug

– Masked Hunter

5.624 Conenose Bugs (“Kissing Bugs”) and Insects of Similar Appearance in Colorado

– Wheel Bug

– Zelus Luridus

– Water Striders

5.608 Leafhoppers on Lawns

5.587 Greenhouse Whitefly

5.540 Potato or Tomato Psyllids

5.590 Cicadas

5.513 Oystershell Scale

– Poplar Scale

5.514 Scale Insects affecting Conifers

5.599 Brown Soft Scale: A Common Insect Pest of Indoor Plants

– European Elm Scale

– Pinyon Scale

– Hawthorn Mealybug

5.534 Cooley Spruce Galls

5.511 Aphids on Shade Trees and Ornamentals

5.531 Aphids in Alfalfa

5.568 Aphids in Small Grains

Hymenoptera (Bees, Wasps, Ants, Bees, Sawflies, Horntails)

5.518 Ants in the Home

5.554 Carpenter Ants

– Harvester Ants

5.611 European Paper Wasp

– Baldfaced Hornet

– Yellowjackets

– Black and Yellow Mud Dauber

– Asian Mud Dauber

– Pseneo Punctatus – Leafhopper Hunting Wasp

– Pemphredon Wasps

– Cicada Killers

– Tarantula Hawks

– Velvet Ants

– Pelecinid Wasp

– Rough Bulletgall Wasp

5.576 Leafcutter Bees

– Wool Carder Bee

– Bumble Bees

5.585 Brownheaded Ash Sawfly

– Imported Currantworm

– Elm Leafminer

5.560 Pear Slugs

5.604 Pigeon Tremex and Giant Ichneumon Wasp

– Sirex Horntails

5.612 Wheat Stem Sawfly: A new Pest of Colorado Wheat

       – Wheat Stem Sawfly in Colorado – Frequently Asked Questions

Megaloptera (Dobsonflies and Fishflies)

– Western Dobsonfly

Lepidoptera (Moths, Skippers, Butterflies)

5.504 Attracting Butterflies to the Garden

– Colorado Hairstreak

– Two-tailed Swallowtail

– Black Swallowtail/Parsleyworm

– Painted Lady

– Mourning Cloak

5.508 Caterpillars in Field Crops: I

5.564 Caterpillars in Field Crops: II

5.565 Caterpillars in Field Crops: III

5.577 Caterpillars in Small Grains

– Linden Looper

5.598 Indian Meal Moth

5.597 Miller Moths

– Questions and Answers about Miller Moths

5.581 Tobacco (Geranium) Budworm

5.538 Western Bean Cutworm:

5.603 Armyworms

5.517 Hornworms and Hummingbird Moths

– Achemon Sphinx

– Leafy Spurge Hawk Moth

– Whitelined Sphinx

– Bumble Bee Clearwing Moths

5.566 Peach Tree Borer

5.614 Lilac/Ash Borer: A Common Wood Borer of Colorado’s Street Trees

5.580 Snailcase Bagworm

5.583 Tent-making Caterpillars

Douglas-fir Tussock Moth as a Pest of the Urban Forest

– American Dagger Moth

– Banded Woollybear

– Saltmarsh Caterpillar

+ Gypsy_Moth

– Io Moth

– Cecropia Moth

– Polyphemus Moth

– Black Witch

5.537 Stalk Borers in Colorado Field Corn

5.529 Pine Tip Moths

5.591 Zimmerman Pine Moth

– Western Spruce Budworm (CSFS Quick Guide)

5.613 Codling Moth

– Mexican Jumping Bean Moth

– Alfalfa Webworm

– Multiplumed Moth

Mantodea (Mantids)

5.510 Mantids of Colorado

– European Mantid

Microcoryphia (Jumping Bristletails)

Neuroptera (Lacewings, Antlions, and Allies)

– Wasp mantidfly

Odonata (Dragonflies and Damselflies)

Orthoptera (Grasshoppers, Crickets, Katydids and Relatives)

5.536 Grasshopper Control in Gardens and Small Acreages

5.535 Grasshoppers in Field Crops

– Broadwinged Katydid

– Jerusalem Cricket

Phasmatodea

– Walkingsticks of Colorado

Phthiraptera (Lice)

Plecoptera (Stoneflies)

Psocoptera (Booklice and Barklice)

– Booklice

Thysanoptera (Thrips)

Siphonaptera (Fleas)

– 5.600 Fleas and Plague

Strepsiptera (Twisted-wing Parasites)

Trichoptera (Caddisflies)

Non-Arthropods

5.515 Slugs

– Brown Garden Snail

– Nightcrawlers

5.609 Weird Worms

5.573 Insect Control: Insect Parasitic Nematodes

– Fly Fungus