The Dasypogoninae subfamily is dominated by the Diogmites in the east. Saropogon and Cophura in the west. Generally open habitat dwellers with some exceptions in Diogmites. I will add some western shots when I have them.

The Diogmites genus is an extensive North American and South American group with a significant number of eastern species. I have twelve presently on the Arkansas list with eleven confirmed including the new species. They are fairly distinctive among the robbers with their long legs and often red and brown based coloration. Many have large green eyes. They are aggressive predators and seem to prefer wasps of any size for their prey of choice. In Florida (where the above shot was taken) and in Texas they can take dragonflies. I have never seen a dragon kill by a Diogmites in Arkansas. Certainly, like most robbers, they will take what is local and abundant when they have to. I have seen larger Diogmites eating smaller species of Diogmites.

They can be confusingly alike initially (also see the Saropogon) but as you see more of them, as with most insects, they begin to show behavior and marking differences with closer inspection. Diogmites often perch close to the ground or on low vegetation and make fast forays to return to nearly the same location. Often known as Hanging Thieves due to their characteristic habit of dangling by their front pair of legs when feeding.

Eastern Diogmites: (there are six other strictly western species known)

 

D. angustipennis Loew 1866 {KS NE WY CO NM OK AR IL TX}

D. basalis (Walker) 1851 {IL to NH south to TN and NJ, CO}

D. bilobatus Barnes 2010 {TX KS OK LA AR}

D. crudelis Bromley 1936 {NC SC FL AL MS GA}

D. discolor Loew 1866 {MO to CT south to AL GA}

D. esuriens Bromley 1936 {NC SC FL GA AL}

D. fragilis Bromley 1936 {TX}

D. herrennius (Walker) 1849 {OH}

D. misellus Loew 1866 {KS to MA south to TX and FL}

D. missouriensis Bromley 1951 {MO OH KY MS LA AR}

D. neoternatus (Bromley) 1931 {Extensive central and eastern US}

D. platypterus Loew 1866 {Extensive central and eastern US except FL}

D. pritchardi Bromley 1936 {OK TX AR}

D. properans Bromley 1936 {LA AL MS GA FL}

D. salutans Bromley 1936 {MS AL GA FL VA NC SC}

D. ternatus Loew 1866 {LA FL TX KS AR}

D. texanus Bromley 1934 {OK TX AR}