Taxonomic review of the Grammia nevadensis species group (Lepidoptera: Arctiidae) with descriptions of`two new species Author Ferguson, Douglas C. Author Schmidt, Christian text Zootaxa 2007 1405 39 49 journal article 10.5281/zenodo.175492 fdd621e5-2e7d-471a-be4c-abe5550499d3 1175­5326 175492 Grammia nevadensis gibsoni ( McDunnough, 1937 ) revised status ( Fig. 1 d) Grammia gibsoni was described from the Canadian prairies ( type locality: Calgary, Alberta; Types in CNC). It is a relatively brightly­coloured representative of nevadensis , that occurs in the northern Great Plains from Alberta to Manitoba, south through Montana. Gibsoni is intermediate between superba and nevadensis in many respects, in that it has wider forewing bands and less saturated hindwing colours than superba . Gibsoni phenotypes also occur south to at least south­central Wyoming. To the west, it is largely replaced by superba north of the Great Basin, and nevadensis to the southwest.