1. Posterior third of the elytra with two slightly oblique pubescent bands. Mexico............. P. distortus (Chevrolat, 1860)
– Posterior third of the elytra lacking oblique or transverse pubescent bands........................................ 2
2(1). Anterior pubescent band of the elytra transverse, somewhat sinuous; outer angle of elytral apex angulate. Mexico (Michoacán, Durango, Mexico)...................................................... P. virgulatus Chemsak & Linsley, 1974
– Anterior pubescent band of the elytra not transverse, strongly sinuous; outer angle of elytral apex rounded. Mexico (Chiapas), Guatemala, Honduras, Nicaragua.................................................... P. championi (Bates, 1885)