Epicaerus (Epicaerus) impar Sharp 1891

Hab.GUATEMALA, Totonicapam 8500 to 10,500 feet (Champion).

Gracilis, niger, opacus, subtiliter squamosus; prothorace elongato, angusto, obsolete rugoso; elytris seriatim sat fortiter, minus profunde punctatis.
 
Long. 9—10 millim.
 
Mas elytris subparallelis, humeris anterius prolongatis.
 
Fem. elytris subovatis, humeris omnino obtusis.

Black, rendered somewhat grey by a thin squamosity which is most conspicuous on the elytra. Rostrum with a broad, shallow, angular impression on the front, this in the male being rather deeper and canaliculate all along the middle; at the summit of the impression there is a distinct fovea; the surface is rather finely punctate, and bears a setose squamosity. Thorax elongate, narrowed in front, the surface rendered uneven by coarse, very shallow depressions, the disc slightly deplanate; closely and finely punctate and clothed with depressed setæ. Elytra with series of moderately large, distant, shallow punctures, clothed with thin, closely adherent scales, and bearing also a scanty, very short squamosity. Under surface setose; the first ventral suture slightly arcuate; the male with the base of the ventral surface rather deeply depressed.
 
This species is remarkable on account of the great difference in the form of the base of the elytra in the sexes. Only one male and two female examples of it were obtained.