56 NEOTROPICAL PSELAPHIDAE 



Slide-mounts show the penis to be large, 0.126 mm., long; longer than the 

 third, fourth, and fifth sternites united, in four male paratypes. 



General punctation of the dorsal body surface very minute, the punctules 

 each bearing a seta. In slide-mounts of four male paratypes, one female para- 

 type and female allotype, the following averages obtain: pronotal disc with 

 4 to 5 punctures per 0.04 sq. mm. ; elytral disc with 7 to 8 punctures per 0.04 

 sq. mm.; tergites with 3 to 4 punctures per 0.04 sq. mm.; these punctures small, 

 very isolated, not recessed. 



Prostemum medianly gibbous anterior to coxae, but not carinate. 



Mesostemum laterally carinate each side, to form the usual ante-coxal 

 plate between the middle coxae and prepectoid area. 



Metasternum very large, twice as long as first stemite, or about one-fifth 

 shorter than first and second sternites united; medianly with a longitudinal 

 entire carina, this carina strong in basal two-thirds of its length. 



In slide-mounts of both sexes, under high magnification, the following 

 sternal foveae are demonstrable: lateral prostemal foveae, one anteriad of each 

 of the anterior coxae in the basistemum; lateral mesosternal foveae well de- 

 veloped, in the prepectoidal wall just anteriad, and on each side of the meso- 

 sternal field or ante-coxal plate noted above; median mesosternal fovea, un- 

 paired, at anterior end of ante-coxal plate. This mesosternal fovea can be seen 

 in triangle mounts as well. Other foveae, e.g. vertexal, gular, etc. have been 

 previously noted. The second stemite has a well-developed pair of foveae, long, 

 cylindrical, whorled lumen. These are placed one just above each side of the 

 transverse fossa at base of second sternite, and hence parallel to the fossa, with 

 the orifice opening laterally, and the fovea ending medianly near the center of 

 the fossa. These foveae are present in both sexes. 



Coxae shorter than in chickeringi. Anterior coxae conical, longest. Middle 

 coxae conico-ovoidal, in slightly confluent cavities, the mesosternal and meta- 

 stemal processes not quite meeting, the coxae subcontiguous. Posterior coxae 

 shortly conical, contiguous or very nearly so, with the metasternum just per- 

 ceptibly visible between them as a microscopically acute point. 



Femora moderately inflated. Tarsi three-segmented, cylindrical, first tar- 

 somere minute, second and third very much longer, the second slightly longer 

 than third ; end of distal segment with two arcuate, equal claws. 



Allotype female differs from the holotype male as follows: size, color, 

 pubescence, maxillary palpi, pronotum, elytra are not different. Eyes vestigial, 

 reduced to two facets on each side of the head, giving a long, evenly arcuate 

 and convergent aspect to the tempora. This great reduction of eye is typical of 

 the tribe, but in this species reaches a maximum expression. 



Antennae like the male, save that the segments VIII, IX, and X are not so 

 asymmetrical, XI shorter, not quite so long as VIII, IX, and X united, and the 

 club is indistinctly formed as compared with the males. 



Ventral surface of the head is different in that the converging carinae form 

 a very long triangle or V-shaped pattern, these carinae fusing where head and 

 neck meet, and enclosing a shorter gular fovea. 



