1	Secondary punctures of pygidium finer, relatively inconspicuous(Fig. 54E); outer subhumeral stria usually complete; Guianas	Operclipygus guianensis sp. n.
–	Secondary punctures of pygidium coarser, conspicuous(Fig. 54C); outer subhumeral stria usually interrupted; western Amazonia	Operclipygus hirsutipes sp. n.