NORTH AMEEICAN BUPEESTID BEETLES 177 



the median depression, and sparsely clothed with short, recumbent, 

 whitish hairs, which are denser and longer in the median and lateral 

 depressions. Scutellum not distinctly carinate, but the surface 

 finely, densely reticulate. 



Elytra about equal in width to pronotum at base, and distinctly 

 wider at base than just behind the middle; sides slightly expanded 

 for a short distance behind base, feebly narrowed to behind the 

 middle, where they are obsoletely, arcuately expanded, then arcu- 

 ately narrowed to the tips, which are separately, narrowly rounded, 

 and feebly serrulate; sides of abdomen broadly exposed above; disk 

 feebly flattened, with broad deep basal depressions, and each elytron 

 with three fine, irregular, vague costae extending to near the apex, 

 one along the suture, and two on disk ; surface densely, finely imbri- 

 cate-punctate, sparsely clothed with short, inconspicuous hairs, 

 and each elytron ornamented with feebly indicated, white pubescent 

 spots as follows: One in basal depression, one in front of middle 

 between the two discal costae, one at the middle between costa and 

 lateral margin, and one at apical fourth near the sutural margin. 



Abdomen beneath coarsely punctate, the punctures sparse on 

 median parts, but more or less confluent and transversely rugose on 

 basal segments, and segments two to five with a large whitish pube- 

 scent spot at sides, placed transversely along anterior margin of 

 segments; first segment strongly convex, and without a median de- 

 pression ; last segment broadly rounded at apex ; suture between first 

 and second segments distinct at the side; vertical portions of segments 

 with a spot of long, dense, whitish pubescence; pygidium coarsely 

 punctate, strongly carinate, but the carina not projecting. Pro- 

 sternum coarsely, sparsely punctate, and very sparsely clothed with 

 long, semierect, whitish hairs; prosternal lobe broad, strongly decli- 

 vous, and broadly, deeply, arcuately emarginate in front; prosternal 

 process broad, and the sides parallel to near the apex, which is 

 broadly rounded. Tibiae slender, the anterior and middle pairs 

 slightly arcuate, and all pairs armed with a distinct tooth on inner 

 margin at apex. Posterior tarsi slightly shorter than tibiae, and the 

 first joint about as long as the following three joints united. Tarsal 

 claws similar on all feet, cleft near the middle, the inner tooth 

 broad, shorter than outer one, and not turned inward. 



Length, 12 mm. ; width, 3 mm. 



Female. — Differs from the male in being larger and more robust, 

 uniformly greenish blue above; front of head broader; eyes more 

 broadly oblong; costae and pubescent spots on elytra more distinct; 

 tibiae with a shorter tooth at apex, and the tarsal claws more 

 feebly cleft. 



Length, 13 mm. ; width, 3 mm. 



