Couplet 172

172a:  Base of pronotum with marginal groove that extends laterally onto hypomeron, ending in a pit near posterior margin of coxa; pronotum narrowed posteriorly, not margined laterally; head sharply narrowed behind distinct temples to form narrow neck; elytra sparsely to densely setose

Anthicidae   p. 440

172b:  Basal groove of pronotum, if present, not ending in pit on hypomeron; pronotum margined laterally or not; elytra with or without setae, length variable