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Robber Fly10 locationsInsect/Spider
.: Timknorr :.
May 14 2014
Esperero Trail #25
.: juliachaos :.
May 9 2010
Horton Creek Trail #285
TypeInsect/Spider
FamilyAsilidae - Robber Fly
Images Bing, Google

Efferia sp.

Common Names:Fly, Robber Fly

Description:All robber flies have stout, spiny legs, a dense moustache of bristles on the face (mystax), and 3 simple eyes (ocelli) in a characteristic depression between their two large compound eyes. The mystax helps protect the head and face when the fly encounters prey bent on defense. The antennae are short, 3-segmented, sometimes with a bristle-like structure called an arista.

The short, strong proboscis is used to stab and inject victims with saliva containing neurotoxic and proteolytic enzymes which paralyze and digest the insides; the fly then sucks the liquefied meal through the proboscis. Many species have long, tapering abdomens, sometimes with a sword-like ovipositor. Others are fat-bodied bumblebee mimics. Adult robber flies attack other flies, beetles, butterflies and moths, various bees, ants, dragon and damselflies, Ichneumon wasps, grasshoppers, and some spiders.

Comments:The family Asilidae contains about 7,100 described species worldwide.


Source: Wikipedia
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