1) Arthropod family 2) Family asilidae 3) Family of winged robbers 4) Robber flies 
The Asilidae are the robber fly family, also called assassin flies. They are powerfully built, bristly flies with a short, stout proboscis enclosing the sharp, sucking hypopharynx. The name `robber flies` reflects their notoriously aggressive predatory habits; they feed mainly or exclusively on other insects and as a rule they wait in ambush and.....
[n] - robber flies
family Asilidae noun robber flies