KEY TO THE SPECIES OF ACROPTEROXYS

(modified from Vaurie 1948 and Martins and Pereira 1965)

1. Antennal club of five antennomeres; sides of pronotum more or less straight and parallel sided ............................................................... 2

1′. Antennal club of six antennomeres; sides of pronotum sinuate …. A. acuminatus Gorham

2. Head and pronotum coarsely and densely punctate; pronotum unicolored .............................. 3

2′. Head and pronotum sparsely and finely punctate; pronotum generally bicolored ................... 4

3. Pronotum parallel sided, basal third not constricted; pronotal disc with punctures coalescent, sides with punctures not coalescent ...................................... A. caudatus Gorham

3′. Pronotum subparallel sided, base slightly wider than apex, with constriction in basal third; pronotal disc with punctures not coalescent, sides with punctures coalescent ....................... ....... A. cervantesi Mora-Aguilar and Delgado, new species

4. Most of pronotum red with piceous spot not reaching sides; elytral interstices with large, deep punctures; body broad, robust ................. ........................................ A. lecontei (Crotch)

4′. Pronotum variable, entirely piceous or red, or if with spot red not reaching base or apex; elytral interstices with small, shallow punctures; body narrower, slender ............. A. gracilis (Newman)