The dorsal abdominal patterns on Laphystia are almost unique enough to determine species but are hard to see except in hand. Here are the nine most likely species in the Arkansas, Oklahoma and Texas area. Drawings are from Wilcox's 1960 summary article on the genus in North America. Note that only three have a wide area of clear space between the pollinose sections on the first segment. Compare to the shot of L. bromleyi on this site. And note the subtle differences in the abdomen in bromleyi vs. ochreifrons.