DASCILLIDAE, Guerin-Meneville, 1843

Johnston, M. Andrew & Gimmel, Matthew L., 2020, Review of North American Dascillidae (Coleoptera: Dascilloidea), with Descriptions of Dramatic Female Wing Reduction, The Coleopterists Bulletin 74 (4), pp. 731-757 : 753

KEY TO SPECIES OF NORTH AMERICAN DASCILLIDAE

1. Prosternal process separating procoxae; robust beetles, length usually more than 10 mm; hind wing with apical field short, about onefourth length of wing; penis with dorsal lobe longitudinally cleft; female elytra extending to abdominal apex; ( Dascillinae ) ................... ................... Dascillus davidsoni LeConte

10. Procoxae contiguous, not separated by prosternal process; more slender beetles, length usually less than 10 mm; hind wing with apical field longer, about one-third length of wing; penis with dorsal lobe not cleft; female elytra reduced, at most half as long as abdomen; ( Karumiinae : Anorus) .................... 2

2. Pronotum distinctly wider at posterior angles than anterior angles, pronotum widest posterior to middle; elytron with distinct marginal sulcus along most of length; dorsal setae dense, short, mostly decumbent; scutellar shield setose; hind wing with radial cell closed completely, wedge cell larger and separated from wing edge by half length of cell; penis with ventral lobe long, about as long as dorsal lobe, sinuous, blunt at apex, not clawlike; phallobase only slightly emarginate medially at base; female with elytra covering basal third to half of abdomen; predominantly west of Colorado River ............. ............................ Anorus piceus LeConte

20. Distance between posterior angles of pronotum subequal to distance between anterior angles, pronotum widest at middle; elytron without distinct marginal sulcus; dorsal setae sparse, long, erect, especially on pronotum; scutellar shield completely glabrous; hind wing with radial cell widely open posteriorly, wedge cell small and separated from wing edge by at least length of cell; penis with ventral lobe short, much shorter than dorsal lobe, pointed and ventrally curved, clawlike; phallobase distinctly emarginate medially at base; female with elytra reduced to indistinct scales; predominantly east of Colorado River ................. Anorus parvicollis Horn