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Welcome to the Colorado State University Extension Western Colorado Entomology web site. This site was created and is maintained by Tri River Area Extension Entomology & Agronomy, and is dedicated to presenting factual information on the insects and insect related issues affecting western Colorado.

Native Insects, Hymenoptera-Ants, Bees, Hornets, Sawflies, and Wasps   arrow

Hymenoptera-Ants, Bees, Hornets, Sawflies, and Wasps

Apidae

Bombus sp.

Bumble Bee
Colorado Insects of Interest Fact Sheet (pdf)
Bumble bee in purple flower.

Photo by Whitney Cranshaw.

Crabronidae

Pemphredon spp.

Pemphredon Wasp
Colorado Insects of Interest Fact Sheet (pdf)
Pemphredon Wasp

Photo by Whitney Cranshaw.

Crabronidae

Pseneo punctatus (Fox)

Leafhopper Hunting Wasp
Colorado Insects of Interest Fact Sheet (pdf)
Leafhopper Hunting Wasp

Photo by Whitney Cranshaw.

Cynipidae

Disholcaspis quercusmamma (Walsh)

Rough Bulletgall Wasp
Colorado Insects of Interest Fact Sheet (pdf)
Rough Bulletgall Wasp

Photo by Whitney Cranshaw.

Formicidae

Pogonomyrmex sp.

Harvester Ants
Colorado Insects of Interest Fact Sheet (pdf)
Harvester Ants

Photo by Whitney Cranshaw.

Megachilidae

Anthidium manicatum (L.)

Wool Carder Bee
Colorado Insects of Interest Fact Sheet (pdf)
Wool Carder Bee

Photo by Whitney Cranshaw.

Mutillidae

Velvet Ants
Colorado Insects of Interest Fact Sheet (pdf)
Velvet Ant

Photo by Whitney Cranshaw.

Pompilidae

Pepsis spp., Hemipepsis spp.

Tarantula Hawks
Colorado Insects of Interest Fact Sheet (pdf)
Tarantula Hawk

Photo by Whitney Cranshaw.

Siricidae

Sirex spp.

Sirex Horntails
Colorado Insects of Interest Fact Sheet (pdf)
Sirex Horntail

Photo by Whitney Cranshaw.



Sirex Horntail

Photo by Whitney Cranshaw.

Sphecidae

Sceliphron caementarium (Drury)

Black and Yellow Mud Dauber
Colorado Insects of Interest Fact Sheet (pdf)
Black & Yellow Mud Dauber

Photo by Whitney Cranshaw.

Tenthredinidae

Kaliofenusa ulmi (Sundevall)

Elm Leafminer
Colorado Insects of Interest Fact Sheet (pdf)ElmLeafminer
Elm Leafminer

Photo by Whitney Cranshaw.

Vespidae

Dolichovespula arenaria (Fabricius)

Aerial Yellowjacket
Colorado Insects of Interest Fact Sheet (pdf)
Aerial Yellowjacket

Photo by Whitney Cranshaw.

Vespidae

Dolichovespula maculata (L.)

Bald-faced Hornet
Colorado Insects of Interest Fact Sheet (pdf)
Baldfaced Hornet

Photo by Whitney Cranshaw.

Vespidae

Vespula spp.

Yellowjackets
Colorado Insects of Interest Fact Sheet (pdf)
Yellowjacket

Photo by Whitney Cranshaw.