unknown Saropogon or Stenopogon species
The robber fly in the top image shown here is probably of the genus Saropogon or Stenopogon, but this is not certain. The image was taken in Bastrop Co., Texas, in June, 2008.
The robber shown here was along the John Day River in Wheeler Co., Oregon, in July, 2008. This is a Stenopogon species; most likely S. inquinatus.