162 NEOTROPICAL PSELAPHIDAE 



truncate medianly. Fifth sternite as long as fourth and modified: excavated in 

 median third and laterally the side of the excavation is erected into a prominent, 

 triangular, setose cusp. Sixth sternite as long as fourth and fifth sternites united, 

 granular, with the median third triangularly excavated and almost vertical, 

 that is, this excavation is at right angles to the excavation of the fifth sternite, 

 and covered with very short, dense setae forming a setose pad. 



Metasternum glabrous laterally and pubescent medianly ; medianly broadly 

 concave with tumid margins. 



Anterior femora inflated, flattened on ventral face, with a longitudinal 

 sulcus partially developed on this flattened surface; intermediate femora less 

 inflated, simply flattened ventrally; posterior femora norm,al. 



Anterior legs with each trochanter bearing a thin, arcuate spine about 

 as long as the trochanter. 



Tarsi three-segmented; first tarsomere very short; second and third much 

 longer, with the second very long on the intermediate and posterior legs, where 

 it is twice as long as third tarsomere ; third bearing distally a claw one-third as 

 long as tarsomere. The anterior tarsi are secondarily modified : the second tar- 

 somere is relatively shorter, and much thicker than this segment in the other 

 legs, and the ventral face is flattened and bears stiff setae. This thickened con- 

 dition is not to be confused with the wider second tarsomere of males of related 

 genera. In the latter the segment is wide and thin ; here it is thick and not much 

 wider than the third, and the setae of the ventral face do not form a dense, 

 short, setose pad. 



Allotype Female. As for holotype with the following differences: 



Integument uniformly lightly punctulate. 



Eye relatively a little larger, about equal to the tempora in length, but of 

 the same number of facets, the facets a little coarser. Mandibles smaller. Ventral 

 surface of head and maxillary palpi as in holotype. 



Antennae a little shorter and thicker, segments III to VIII subequal in 

 width ; IV slightly shorter than third or fifth ; V, VI, and VII subequal in length ; 

 IX elongate-obconical, longer than eighth or tenth ; X distinctly shorter than 

 ninth, obconical; XI relatively large, as long as eighth, ninth, and tenth united, 

 subasperate. 



Pronotum and elytra as in holotype. 



Fifth tergite relatively shorter, about one-third longer than fourth and 

 subtriangular in outline. 



Second sternite (first visible medianly) relatively longer, longer than the 

 next three united, these latter simple, convex, very short. Last sternite (fifth 

 visible medianly) long, almost as long as first visible, transversely semilunar, 

 with basal margin convex and apical margin concave, investing the convex 

 apical margin of fifth tergite, more coarsely punctate than other sternites and 

 medianly tumid. 



Legs with femora not inflated, and trochanters simple, not armed. Second 

 tarsomere of anterior tarsi not thickened and not ventrally setose. 



Metasternum not medianly concave, but distinctly tumid medianly. 



