One of the more primitive robber groups are the several genera which now are included in the Leptogastrinae. (See the fine internet key here: Geller-Grimm Key.) We have five genera in this family and I have previously seen the Tipulogaster species. This is confirmed by a specimen examination as the rare (for our state) Psilonyx annulatus. Now known from two counties in Arkansas. It appears it may be much paler in life and more banded appearing than the Leptogaster. They are all slow flying and secretive robbers which resemble damselflies in flight except for those long dangling legs. These robbers glean prey from plants and occasionally take spiders from their webs instead of catching prey on the wing. This species and the Tipulogaster I have seen were in shaded woods with many exposed stems for perching.

One of the true Leptogaster genus. This a very rufus one from the prairie in Franklin county. L. murina. Stayed very low in the grass hovering from stem to blade and stem. Several flying in the same area of about twenty by twenty feet. Nowhere else that day in the open prairie area.

Top shot, same guy.  Note the very green eyes and the very clean thorax. There were no scutellar bristles either and this is a character for several in the Leptogaster genus.

The larger female from Pulaski county. In a flower field near Pinnacle mountain state park.

Side shot of a species from Ed Gordon woods again. I was looking for the Tipulogaster I have found there and located this female. She is a Psilonyx again. Very strongly patterned abdomen. Compare with the male up top.

Side shot of Norm's pet yard species Leptogaster brevicornis. He has been slowly perfecting the shot. This is a fine one. I think he can stop now.

Lateral of a female from Searcy county that has a spider kill she gleaned. We are working on the species on this one. Norm has a male and from the shots he sent me it appears to be the first state documented Leptogaster flavipes. This species was flying in previously burned woodland with open understory in the Ozarks.

And finally the true Tipulogaster. Note the shellacked look of the thoracic dorsum.  None of the other thin Leptogaster creatures has that feature. Slightly larger than several in the Leptogaster genus and certainly the Beameromyia.