Couplet 72

72a:  Antennal scape normal, shorter than club; funicle longer than entire club; posterior edge of last ventrite crenulate (Ostomopsis)

Cerylonidae   p. 433

The myxophagan family will key out here if a mistake is made in couplet 2.  They match the antennal characters in this couplet but lack the crenulations on the last ventrite.  These tiny (length 0.5 to 1.2 mm) beetles can be easily recognized by having only three ventrites (five in Ostomopsis)

72b: Antennal scape large, subequal to length of club; funicle with 3 antennomeres, shorter than first antennomere of club (Micropsephodes)