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Giant Robber Fly
Promachus hinei
33.1493, -97.0193
Field Notes
Description:
This is a large robber fly which is approximately 3/4 - 1 1 /2 inches in length. Females are larger than males. This fly has black eyes, a light colored "beard" on the face and a brown thorax. The long, cylindrical abdomen is cream colored with thick, black cross-bands. The abdomen has a black tip. The wings are clear and brown, and do not reach the end of the abdomen when the fly is at rest. The legs are reddish-brown and hairy.
Habitat:
Sandy beach along Lewisville Lake.
Notes:
The Asilidae are the robber fly family, also called assassin flies. They are powerfully built, bristly flies with short, sharp, stout sucking mouthparts. The name "robber flies" reflects their notoriously aggressive predatory habits; they feed mainly on other insects and they largely wait in ambush and catch their prey in flight.
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