Eastern-distribution
Guides
Eudioctria disjuncta
A small robber fly in the subfamily Stenopogoninae, measuring 6–8 mm in length. One of the tiniest North American robber flies, superficially resembling Cerotainia species but distinguished by shorter antennae and behavioral perching preferences. The genus Eudioctria is primarily western in distribution, with E. disjuncta being one of four eastern species.