TYCHINI 271 



the anchorage of one arm of the supratentorium, each tumulus just beyond an 

 arm of the bifurcated median carina. A median triangular portion of the anterior 

 vertex (bounded by the interantennal line and an oblique line from antennal 

 insertion to bifurcated arm of median carina) subglabrous, with few scattered 

 granules; this triangular area transversely depressed just posterior to inter- 

 antennal line, and with a transversely suboblong tumulus with blackened peri- 

 phery placed just posterior of this depression and just apical of median carinal 

 bifurcation. Frontoclypeal surface long, nearly vertical, convex and simple save 

 for a small median tuberculation on interantennal line. Labrum short but un- 

 usually wide, with a simple, truncate margin. Ventral surface of head trans- 

 versely tumid, coarsely punctate, not medianly carinate. 



Maxillary palpi distinctly paler, four-segmented ; first segment very short, 

 triangular, wider apically than base of second; second sharply arcuate at base, 

 slender and cylindrical in basal half, gradually inflated in apical half, about five 

 times longer than first; third globose-triangular in lateral outline, slightly wider 

 than second but one-third as long as second ; fourth relatively short, one-fourth 

 longer than second, subsecuriform-conical in outline with blunted apex bearing 

 a long, slender palpal cone. 



Antennae eleven-segmented, widely separated, absolutely simple; segment I 

 cylindrical, longer and wider than second; II subcylindrical, longer and wider 

 than third; III subobconical ; IV-VII moniliform; VIII transversely monili- 

 form, slightly wider; IX transversely ovate-moniliform, wider than eighth; X 

 subquadrate-submoniliform, much wider and longer than ninth; XI as in 

 Dalmoburis. 



Pronotum subquadrate, one-tenth wider than long, widest in apical two- 

 fifths, sides converging apical and basal of this point; disc evenly convex. Integ- 

 ument granulate. No lateral longitudinal sulci or lateral foveae. Subbasal trans- 

 verse sulcus strongly angulate medianly, continuing lat€rally where sulcus is 

 expanded, then narrowing and passing far down pronotal flanks. 



Elytra simply punctate, with angulate humeri ; each elytron with a vestigial 

 sutural stria which is discernible only at apex, and lacking basal foveae ; each 

 elytral flank with a strong, entire longitudinal carina but lacking subhumeral 

 fovea or longitudinal sulcus. 



Abdomen with five visible tergites having a length ratio of 2.5/1.5/1/1.5/1. 

 First tergite, in addition to its much greater length, is roughly punctate, the 

 punctures very large, shallow, elongate-oval whereas the remaining tergites are 

 simply punctate. Margins as follows: first tergite with an exceptionally high, 

 entire external carina which continues the line of the elytral-flank carina, and a 

 short oblique internal carina for basal third (the triangular area between carinae 

 obliquely elevated with the orifice of a large fovea seen beneath this oblique 

 elevation) ; second, third, and fourth tergites with a short, thick, straight carina 

 each side at base. 



Abdomen with six stemites; the first four rugosely punctate with large, 

 oval, crowded punctures ; sixth simply punctate ; six stemites with a length ratio 

 of 1.8/1.8/.7/.6/.5/2. First and second stemites subequal, the first much longer 



