Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Asilid on Saltbush - Scleropogon duncani - female

Asilid on Saltbush - Scleropogon duncani - Female
Anza-Borrego Desert State Park, San Diego County, California, USA
May 25, 2005
Size: BL about 22-23 mm
Another handsome elongate asilid, found perched on Saltbush at Yaqui Well. Again, the closest I can come is a Stenopogon. Any help is much appreciated!

Beautiful shot
Of this robber.

Another Scleropogon duncani (
Another Scleropogon duncani (female); looks darker than the previous individual but must be same (nothing else quite like it in S. Calif.).

Scleropogon duncani (female)
thanks for the identification, Dr. Fisher. It's great to have both the male and female of the species, because I do see some differences -- the male seems more elongate (more or longer abdominal segments) and has a red appendage.

Glad to help Lynn. Typically
Glad to help Lynn. Typically the females of S. duncani would have some red at the tip of the abdomen (though less than in the males). Also, the femora are more reddish ventrally (in both sexes) - which is why I mentioned that this individual seemed darker in color.

Scleropogon duncani female
I appreciate your clarification of the traits to look for. The two robberflies were photographed at quite different sites and habitats. The female was at about a thousand feet higher elevation. Sometimes the low desert individuals are lighter. Thanks again.