Couplet 161

161a:  Pronotum with sublateral lines or grooves that extend from base to anterior margin, or at least beyond midpoint; head usually with sublateral lines extending from median margin of eye to pronotum; lateral margins of pronotum smooth, wavy, or with few obtuse angles, not acutely denticulate or serrate; head not sharply constricted to a distinct neck; body oval to elongate, subcylindrical to strongly
dorsoventrally flattened

Laemophloeidae   p. 431

161b:  Pronotum without sublateral lines or grooves that extend anterad of middle; head variable; body variable, often rather convex, oval or rounded; if body flattened and pronotum with sublateral grooves, then lateral margins of pronotum sharply denticulate, anterior angles acutely projecting, or head sharply constricted behind small temples