California Department of Fish and Wildlife
Aquatic Biological Assement

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Muscidae Level 1 Level 2



Key Characters

"House or bristle flies." Head reduced to mouth hooks and internal skeleton. Abdominal segments w/ creeping welts, last one w/ prolegs; smooth appearance. Posterior end with spiracles on short stubs; never on stalks.

Tolerance 6
Distribution CA, OR, WA, NV, AZ, Baja