I photographed these barklice on a hardwood tree trunk at Caddo Lake SP. For a long time, I kept trying to make these into an Hemipteran, only to finally see an illustration of this species in Eaton & Kaufman's "Field Guide to Insects of North America" (p.35), then got a species ID from BG:
Among the 30+ individuals in this image, the ones with white dots on the FW are males; there are about 5 smaller females in the crowd.
Small (size 18 or so) black body, white veins on wings. I am not familiar with this critter.
This single specimen was sitting on a rock on the shoreline.
When I see these I think emperors royal guards. They just have a look to them.
common bark louse
Psocodea is a taxonomic group of insects comprising the bark lice, book lice and true lice. It was formerly considered a superorder, but is now generally considered by entomologists as an order. Despite the greatly differing appearance of lice, they are believed to have evolved from within the former order "Psocoptera", which contained the bark lice and book lice. Psocodea contains around 11,000 species, divided among seven suborders.