This study deals with the sister genera Chaetophloeus, new genus and Plocamocera Spinola of the checkered beetle subfamily Epiphloeinae. Chaetophloeus is monotypic and is described on the basis of C. hispidus, new species. Plocamocera is revised to include 35 species as follows: P. castanea, new species; P. pupula, new species; P. jayhawkalis, new species; P. confrater Kuwert; P. procera, new species; P. aliguantula, new species; P. minima, new species; P. manausensis, new species; P. coactilis, new species; P. sericella Spinola; P. auratilis, new species; P. argentea, new species; P. lucis, new species; P. sesquipedalis, new species; P. salasis, new species; P. iota, new species; P. prolixa, new species; P. quadrula, new species; P. baria, new species; P. aura, new species; P. buenavista, new species; P. taruma, new species; P. aspera, new species; P. paris, new species; P. bispina, new species; P. onorei, new species; P. carnegei, new species; P. santa, new species; P. sericellopsis, new species; P. insula, new species; P. ambra, new species; P. similis, new species; P. bolivari, new species; and P. selva, new species. A neotype is selected for P. sericella Spinola. Lectotypes are designated for P. confrater Kuwert and P. byssinus Erichson (junior synonym of P. sericella Spinola). Five new synonymies are recognized, they are P. confrater var similis Kuwert (junior synonym of P. confrater Kuwert), P. confrater var. sericelloides Kuwert (junior synonym of P. confrater Kuwert), P. impressicollis Pic (junior synonym of P. confrater Kuwert), Epiphloeus byssinus Erichson (junior synonym of P. sericella Spinola), and P. latefasciata Pic (junior synonym of P. sericella Spinola).

Plocamocerans are diurnal, but are considerably active at night, highly cryptic on bark, when disturbed conduct flylike escape behavior, and are predators of lignicolous insects. The morphology of integumentary sensilla on the antenna, pronotum, and elytra are described, and SEM photographs of them is provided. Described for