172 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 65 



the former strongly shining; elytra black, with variable orange- 

 yellow markings, which are sometimes entirely wanting; beneath 

 black, with a strong purplish reflection and very sparsely pubescent. 



Head feebly convex, with the sides feebly obliquely narrowed to 

 the vertex ; front and vertex without distinct depressions or carinae ; 

 surface coarsely and rather sparsely punctate, the punctures oblong 

 and irregularly placed; intervals smooth and shining; epistoma 

 broadly arcuately emarginate in front, forming an obtuse tooth on 

 each side of the emargination. Pronotum transverse, one and one- 

 half times as wide as long, widest just in front of middle, narrower 

 behind than in front; sides arcuately rounded in front, more obli- 

 quely attenuate posteriorly to the posterior angles, which are rect- 

 angular, the marginal line distinct posteriorly; anterior margin 

 deeply arcuately emarginate, with a broadly rounded median lobe; 

 base bisinuate, with a large broadly rounded median lobe, which is 

 feebly elevated near the scutellum; disk with an obsolete longitu- 

 dinal median line terminating in a round deep fovea in ^ront of 

 scutellum, strongly depressed at base near posterior angles, and 

 sometimes with a broad obsolete depression on each side of the median 

 line; surface coarsely and obsoletely punctate at middle, the sides 

 of punctures forming crenulate lines, which are somewhat concen- 

 trical, toward the sides the punctures are larger, deeper and more 

 confluent, the sides forming a network of irregular polygonal areas, 

 with the bottoms densely granulose. Scutellum small, cordate, with 

 the surface depressed and granulose. Elytra wider than pronotum 

 at base; sides obtusely angulate at base, broadly rounded at humeri, 

 feebly sinuate and nearly parallel to apical third, then strongly 

 arcuately attenuate to the tips, which are acute; lateral margins 

 finely serrate posteriorly; humeri not prominent; surface strongly 

 broadly dex3ressed at base near humeral angles, and densely, coarsely 

 scabrous. Abdomen beneath with posterior margin of segments 

 smooth, and the surface coarsely and rather deeply punctate, the 

 punctures deeper, open posteriorly, and somewhat confluent on the 

 basal segments, becoming more obsolete and forming crenulate lines 

 toward the apex; last segment feebly arcuately emarginate at apex, 

 the angles not prominent, and with a distinct serrate subapical ridge. 

 Metasternum densely and coarsely punctate, with the sides well de- 

 fined. Prosternum strongly convex, anterior margin truncate, 

 declivous and without a median lobe, the surface rather finely and 

 densely punctate; prosternal process (feebly convex, sides narrowly 

 margined, surface densely and coarsely punctate, abruptly expanded 

 behind the coxal cavities, and with an acute tooth at the apex. First 

 joint of posterior tarsi as long as the following two joints united. 



Length, 7-15 mm. ; width, 2.5-5.5 mm. 



