132 NEOTROPICAL PSELAPHIDAE 



with long setae (0.067 mm. long) which are distinctive since the rest of the body 

 is subglabrous save for the ventral capitates of the head, and the hirsute meta- 

 sternum noted later; this last segment is about one-half as long as the total 

 antennal length; simply truncate at base, slightly sinuate apically, the segment 

 being subsecuriform in outline with a straight lateral face becoming concave 

 or sinuate apically, and the mesial face straight in basal half and strongly 

 convex in apical half. The antennae are subgeniculate, as a consequence of the 

 elongate first segment ; moderately distant at base, being separated by the tri- 

 angular front, their separation being equal to the width of the eleventh segment. 



Pronotum melbaform, simple, obcordate, with unmodified disc, and rounded 

 lateral margins ; no median basal fovea, but an indistinct transverse, subbasal 

 sulcus which is entire laterally but interrupted medianly; this sulcus or sulci- 

 form stria continues down each lateral flank of pronotum to end in a lateral 

 fovea on each side; this fovea is glabrous, shallow and distinct laterally but not 

 dorsally. Pronotal-prosternal coalescence demarcated by a carina which is 

 anteriorly continuous with the apical pronotal margin. 



Scutellum distinct and sharply triangular. 



Elytra with the humeri obliquely tumid ; each elytron with the sutural stria 

 turning obliquely near the scutellum and parallel to the basal margin, forming 

 a transverse basal carina reminiscent of Sebaga; two small, glabrous basal 

 foveas on each elytron, just posteriad of the transverse basal carina (which 

 separates this species from the unifoveate elytron of the other species of the 

 genus). No subhumeral fovea or subepipleural sulcus on elytral flank. 



Abdomen exceptionally short, specialized, convex. Five visible tergites, first 

 tergite about twice as long as second medianly, and very closely fitted to the 

 elytra, with no basal discal carinae; second one-third longer than third; fourth 

 long, longer than second; fifth subtriangular, not visible from above, ventro- 

 declivous, long being about one-half longer than fourth tergite. Six sternites 

 clearly visible; first forming a short, very transverse plate, about four times 

 wider than long, closely fitted between posterior coxae and metasternum, and 

 also visible laterally as a gradually lengthening plate, ending beneath the 

 elytra; second sternite not quite twice as long as first, and with a prominent, 

 short, longitudinal, slightly arcuate carina from the basal margin on each side 

 between coxa and elytra, so that this carina must be looked for from an oblique 

 view; third sternite very short, half as long as second; fourth still shorter; fifth 

 longer, as long as third; sixth very large, transversely semilunar, with strongly 

 convex basal outline and slightly bisinuate apical outline, investing the apical 

 margin of the fifth tergite; this sixth sternite as long as fifth tergite, or as long 

 as the first to fifth sternites combined. The abdomen has a distinct Globa aspect. 

 Only a small portion of the fourth tergite and none of the fifth visible from 

 above. The abdomen has no margin at all, and consequently the abdomen is 

 formed of a series of unbroken rings ; the first tcrgite-second sternite forms the 

 first ring; second tergite-third sternite the second ring; third tergite-fourth 

 sternite the third ring. For these three rings the terms "tergite" and "sternite" 

 are used in a functional sense only. The fourth tergite and fifth sternite are 



