302 NEOTROPICAL PSELAPHIDAE 



minutely truncate, this truncature scariform and oblique, bearing a small palpal 

 cone. 



Antennae with segment I elongate-cylindrical; II quadrate, smaller; III as 

 long as second, longer than wide, obconical; IV-VIII submoniliform, slightly 

 decreasing in length and slightly increasing in width ; IX larger, quadrate-trape- 

 zoidal; X as long but wider than ninth, transverse-trapezoidal; XI as in cop- 

 tocolus. 



Pronotum with lateral contour, spinoid discal gibbosity, and arcuate basal 

 sulcus as in coptocolus. The arcuate sulcus ends each side in a circular pubescent 

 fovea, and in addition there also extends from each lateral fovea a straight, 

 oblique sulcus to basal margin. That is, two sulci leave each lateral fovea: the 

 arcuate interfoveal sulcus, and an oblique fovea-basal bead sulcus. Median basal 

 fovea minute. Flanks of pronotum glabrous. 



Scutellum large, elongate-triangular, alutaceous. 



Elytra with obtuse humeri. Each elytron with two, equal, circular, pubes- 

 cent foveae. From the inner fovea extends a strong, entire sutural stria. The 

 outer fovea has a subentire discal stria. The inner wall of the discal stria is ele- 

 vated to form a single, strong costa. 



Abdomen with five visible tergites in a length ratio of 8/1.5/1/2.5/2. First 

 tergite strongly margined; last tergite truncate-triangular. All tergites evenly 

 convex, lacking the median bisecting carina of coptocolus. 



Six stemites in a length ratio of 2/3/1/.5/1/1. First stemite medianly ele- 

 vated between posterior coxae into a large alutaceous rhomboidal tubercle ; first 

 two stemites deeply separated, with the trough densely pubescent; last stemite 

 medianly deeply incised or notched. A discoid process of the male copulatory 

 apparatus fits into this notch, when the penis is not exserted, so that the truncate 

 apex of the last tergite is flush with the last stemite. 



Metastemum glabrous laterally and sharply elevated into two longitud- 

 inally carinate tubercles which are separated by a sparsely pubescent and 

 broadly concave median region. 



Anterior legs: trochanter glabrous; femur with a glabrous ovoidal field oc- 

 cupying the basal four-fifths of femoral length, with the posterior margin of 

 the field strongly carinated, this area on the antero-ventral face; tibia arcuate, 

 apically setose on ventral face. 



Intermediate legs: trochanter glabrous, ventrally carinate and extended at 

 apex into a triangular tooth ; femur with a much smaller, fusiform, glabrous field 

 on antero-ventral face; tibia as above. 



Posterior legs: simple, wholly granulate-puntate with straight tibiae. 



Tarsi as for tribe, with two large, arcuate, slightly unequal tarsal claws, 

 one claw being slightly shorter and thicker. 



Allotype Female. As for holotype save that (1) last tergite transversely 

 rhomboidal, with a longer subtruncate apical margin; (2) first stemite only 

 normally elevated between coxae; (3) sixth (last) stemite with the apical 

 margin simply rounded, lacking any median incisure or discoid process. 



Described on two specimens collected from nests of the termite Coptotermes 



