110 NEOTROPICAL PSELAPHIDAE 



transverse sulci. The posterior transverse sulcus lies at about the anterior 

 margin of the eyes, the anterior transverse sulcus extends semicircularly be- 

 hind the raised frontal margin. Front between the antennal bases arcuate. 

 Ventral surface of the head coarsely and conspicuously punctate, without 

 capitulate setae. 



Maxillary palpi four-segmented, first segment minute and cylindrical; 

 second slender, arcuate, apically inflated; third asymmetrically subspherical; 

 fourth widest and longest, oblique at base, acute at apex, subconico-ovate, 

 with an apical palpal cone. 



Antennae short, not longer than the head, separated by half the width 

 of the head, eleven-segmented, segment I and II relatively large, first incon- 

 spicuous because of the deep articulation beneath the front, and shorter and 

 narrower than second segment; second ovate; III to VIII very closely articu- 

 lated, of about same length and width, subequal, distinctly smaller than sec- 

 ond; third obconical; fourth to eighth are transversely moniliform; IX wider 

 than eighth, short and inconspicuously articulated to tenth; X much larger, 

 as wide as eleventh and strongly, asymmetrically triangular, the mesial face 

 being longer and tumified; XI truncate at base, closely appressed to tenth, 

 as long as fifth to tenth segments united, asymmetrically subacute. With minor 

 differences this is a typical Trimiopsis antennal pattern. 



Pronotum trimiform, obcordate, each side with a small lateral fovea within 

 the margin at basal third, and a medial subbasal fovea connected by an entire, 

 biarcuate, transverse, subbasal sulcus; disc simple, slightly flattened (with an 

 oblique light and high magnification, a just discernible ovate depression can 

 be seen). 



Elytra widest medianly, with rounded humeri; each elytron with two 

 conspicuously large basal foveae, the sutural fovea giving rise to a sutural stria 

 which is not entire, that is, it ends a short distance from the apical margin at 

 about apical seventh; the discal fovea gives rise to a short, triangular dorsal 

 depression in basal fourth; neither a subhumeral fovea nor a subepipleural 

 sulcus on the elytral flank. 



Abdomen with a relatively narrow margin and five visible tergites. First 

 tergite with a pair of short, blunt, straight, parallel discal carinae separated 

 by about one-half of segmental width. First three tergites subequal in length, 

 fourth longer, fifth subequal to third and rounded-triangular from a dorsal 

 view. Seven stemites visible, first sternite shorter than second, and triangular 

 between the coxae; second slightly longer than third; third and fourth sub- 

 equally long; fifth shorter, with a small median tubercle at basal margin; 

 sixth as long as second, medianly flattened; seventh rounded-triangular, as 

 long as sixth. 



Frostemum medianly, transversely gibbous, not medianly longitudinally 

 carinate. Middle coxae subcontiguous under high magnification. Posterior 

 coxae shortly conical and contiguous. Metasternum long, nearly as long as 

 first three stemites united, flattened and gently, medianly depressed. Sternal 

 foveae IV very large and conspicous at the lateral angle of each middle coxa. 



