Full reference: S. H. Scudder. 1890. The Tertiary Insects of North America. Report of the United States Geological Survey of the Territories XIII:1-734
Sister taxon: Lystra richardsoni
Type specimen: Packard 119, an exoskeleton (fragment). Its type locality is Green River (Packard Collection), which is in a Bridgerian lacustrine - large diatomite/shale in the Green River Formation of Wyoming.
Average measurements (in mm): body 10.0 x 5.2, tegmen length 10.2