248 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



pronotum, the interspace between the eyes hardly (male) or fully 

 (female) half as broad again as the first an teimai joint; fastigium not 

 very declivent, distinctly (male) or rather feebly (female) sulcate; frontal 

 costa rather prominent, not reaching the clypeus, subequal but narrowly 

 and feebly contracted above, as broad as the interspace between the 

 eyes, scarcely sulcate below the ocellus, punctate throughout; eyes 

 rather large, rather prominent in the male, not at all in the female, 

 much longer than the infraocular portion of the genae; antennae luteo- 

 or fulvo-testaceous, a little iufuscated apically and paler at the base, 

 nearly four fifths (male) or two-thirds (female) as long as the hind femora. 

 Pronotum feebly expanding posteriorly, the disk dark fuscous, a broad 

 dull flavous or cinereous stripe on either side, limited exteriorly by the 

 lateral carinae and generally fading or obsolete on the metazona, leaving 

 between them a mesial fuscous stripe no broader than they, the lateral 

 lobes navo-testaceous below with a postocular piceous band, very broad 

 and sometimes percurrent, but then broadened and diffused or em 

 browned on the metazona; disk very broadly convex, passing almost 

 insensibly into the sub vertical lateral lobes; median carina distinct 

 and sharp on the metazona, almost wholly wanting on the prozona; 

 front margin truncate, hind margin very broadly rounded or subtrun- 

 cate, occasionally subangulate; prozona sparsely punctate, varying 

 from quadrate to distinctly longitudinal, the latter only in the male, a 

 third to a half longer than the finely punctate metazona. Prosterual 

 spine short, stout, conical, shorter and stouter in the female than in the 

 malej interspace between mesosternal lobes twice or more than twice 

 as long as broad with parallel sides (male) or longitudinally subquad- 

 rate (female). Tegmina abbreviate, shorter than the pronotum, rotund- 

 ato-ovate, from a fourth to a half as long again as broad, well rounded 

 apically, approximate or subattingent, rarely attiugent, brownish fuscous 

 sometimes streaked with cinereous. Fore and middle femora of male 

 considerably tumid; hind femora moderately slender, flavo-testaceous, 

 distinctly and rather narrowly bifasciate with blackish fuscous, the 

 geniculation blackish fuscous, the inferior face flavous sometimes iufus- 

 cated; hind tibiae pale fusco-glaucous, the spines pallid on basal, black 

 on apical half, nine to eleven, usually eleven, in number in the outer 

 series. Extremity of male abdomen clavate. very strongly recurved, 

 the supraanal plate triangular with acutangulate apex, nearly plane, 

 with a pair of lateral arcuate blunt incurved ridges, formed of a plica 

 tion beginning with the basal half of the lateral margins but ending 

 abruptly before the median line, the median sulcus very slight and 

 slender, percurrent; furcula entirely wanting; cerci broad and slightly 

 tumid at base, rapidly and regularly tapering in the proximal half, 

 beyond much less rapidly, the distal half forming a compressed, sub- 

 equal, slender, incurved ribbon, hardly more than a third as broad as 

 the base, the tip rounded but slightly angulate below, the whole about 

 twice as long as the basal breadth, suberect; subgenital plate bluntly 



