134 NEOTROPICAL PSELAPHIDAE 



bearing a short palpal cone. Ventral surface of head with a single, median, longi- 

 tudinal carina. Pronotum with simple disc, and three foveae of unequal size, a 

 lateral fovea each side at basal third which are larger than the median, subbasal 

 fovea. Elytra with no dorsal stria, and each elytron with two basal foveae 

 (Raffray, 1904), not trifoveate as stated by Raffray (1908) ; elytra triangular. 

 Abdomen with first tergite with a pair of discal carinae, and much longer than 

 second. Female sex known; male unknown. 



Key to the Species 



Antennae with segments IV-VII cylindrical, VIII much shorter than 

 either seventh or ninth and quadrate; 2.3 mm. long; known only 

 from Bolivia obesus 



Antennae with segments IV and V ovate; VI-VIII progressively 

 shorter and progressively wider; 2.0 mm. long; known only from 

 Brazil crassicornis 



crassicornis Raffray. 1904. Brazil. 

 obesus Raffray. 1904. Bolivia. Genotype. 



PHOBERUS (Raffray, 1904) 



This is a monotypic genus known only from Bolivia. Ventral surface of 

 the head tricarinate, a median, and a lateral longitudinal carina each side of 

 head (in the male the lateral carinae are very strong, and are obsolete in the 

 female). Maxillary palpi four-segmented, first minute; second elongate cyl- 

 indrical, very gradually widening toward apex; third segment briefly obconical 

 (or vertically triangular and as long as wide, with the base acute and apex 

 broadly truncate) ; fourth elongate, regularly fusiform, subacute at base and 

 apex bearing a slender palpal cone. Pronotum subhexagonal, with a median 

 subbasal punctiform fovea, but no lateral foveae. Elytra with no dorsal stria; 

 each elytron with three slightly elongated basal foveae; humeri prominent, 

 nearly square in the male and rounded and obtuse in the female. First tergite 

 longer than second, and with a pair of divergent basal discal carinae. Abdominal 

 margin very strong, wide on the first two tergites. 



Male with second antennal segment longer than first, cylindrical, with the 

 mesial-apical face produced internally into a tooth; ninth antennal segment 

 transverse, with the mesial-apical face triangularly produced into a large tooth ; 

 tenth segment distinctly shorter than ninth and drum-shaped. Head deeply 

 excavated medianly, between eyes and antennal bases, this excavation com- 

 plexly armed; epistome spinoid. 



Female with antennae with segments II and IX not toothed ; the frontal 

 excavation of the head smaller, simpler. 2.0 mm. long. 



armatus Raffray. 1904. Bolivia. Genotype. 



