The placement of this species in Diaprepes by Champion (1911) is erroneous. It does not show the diagnostic characters of that genus: tricarinate rostral dorsal profile and irregular exacavations on pronotum. On the other hand a depression is seen anterior to the eye, a character observed in most of the Central American species of Exophthalmus. This group is currently being reclassified and Rhinospathe will be the valid name. This species would then become Rhinospathe pulverulentus (Champion, 1911) [unpublished]. Diaprepes pulverulentus Champion, sp. n., Biologia Centrali-Americana, Coleoptera, vol. 4, part 3: 180. 1911.
Oblong, black or piceous; densely clothed with cinereous or bluish-white scales (the colour more or less modified by an ochreous exudation), which are condensed into two vittæ on the disc of the prothorax and another along each flank (the intervening spaces appearing sparsely squamose), and a shorter or longer stripe at the base of the alternate elytral interstices, those on the disc sometimes wanting; the surface also set with short scattered decumbent setæ, the seriate elytral punctures each with an oblong scale. Head and rostrum densely punctate, the rostrum finely carinate, the inter-ocular fovea small or wanting. Prothorax transverse, canaliculate down the middle; impressed with scattered foveiform punctures intermixed with a fine interstitial punctuation. Elytra elongate-subtriangular in ♂, broader and widened to the middle in ♀, acuminate and mucronate at the tip, flattened on the disc anteriorly, the disc sometimes with several scattered shallow irregularly placed foveæ; with rows of rather fine punctures which become confused on the outer part of the disc below the base, the interstices feebly convex. Tibiæ without denticles on their inner edge.
Length 13¼—18, breadth 4½—7½ millim. (♂ ♀.)
Hab.NICARAGUA, Chontales (Belt).
Five specimens, varying greatly in size, as well as in the colour of the scales, which is disguised by an ochreous exudation. The vibrissæ are easily abraded, and are wanting in two examples. This insect is less convex than D. albofasciatus, the rostrum is more finely carinate, and the vestiture is much denser over the whole surface.