NORTH AMERICAN BUPEESTID BEETLES 143 



of middle, broadly, arcuately expanded at apical third, then obliquely 

 Attenuate to the tips, which are separately, acutely rounded and 

 strongly serrulate; sides of abdomen broadly exposed above; disk 

 feebly flattened, the junction of the discal flattened area with the 

 convex sides of the elytra has the appearance of an obsolete carina, 

 the sutural margins rather strongly elevated behind the middle, and 

 with broad, deep, basal depressions; surface coarsely, densely imbri- 

 cate-punctate, sparsely clothed with regularly placed short, incon- 

 spicuous hairs, and each elytron ornamented with three indistinct 

 pubescent spots — basal, median, and preapical — the first two fre- 

 quently missing. 



Abdomen beneath sparsely, finely punctate at the middle, more 

 densely toward the sides, more or less transversely rugose on basal 

 segment, sparsely clothed with short, recumbent, cinereous hairs, and 

 with a spot of longer, densely placed, whitish pubescence at the sides 

 of the segments ; first segment broadly concave at middle, the second 

 with a rather wide, deep, smooth groove, which has the sides nearly 

 parallel, and extending from the anterior margin of segment to 

 apical third; last segment subtruncate at apex; vertical portions 

 of the segments densely clothed with long, recumbent, whitish 

 pubescence, except the second, which is glabrous; pygidium strongly 

 carinate, the carina projecting and truncate at apex. Prosternum 

 densely, coarsely punctate, rather densely clothed with moderately 

 long, semierect, cinereous hairs; prosternal lobe broad, moderately de- 

 clivous, and broadly rounded in front, with a broad, shallow emargi- 

 nation at the middle; prosternal process broad, parallel to behind the 

 coxal cavities, then obliquely attenuate to the apex, which is acute. 

 Tibiae slender, straight, anterior and middle pairs with a short tooth 

 on the inner margin at apex, and the posterior pair simple. Pos- 

 terior tarsi slightly shorter than the tibiae, and the first joint nearly 

 as long as the following three joints united. Tarsal claws dissimilar, 

 anterior and middle pairs cleft near the tip, and the teeth nearly 

 equal in length ; posterior claws cleft near the middle, the inner tooth 

 slightly shorter than the outer one, feebly turned inward, but the 

 tips distant. 



Female. — Differs from the male in being more robust, front of 

 head broader, sides more parallel, slightly wider at bottom than at 

 top, and of a more cupreous color; pronotum one-half wider than 

 long; abdomen more sparsely punctate, the first segment convex at 

 middle, and the second without a median groove; prosternum more 

 sparsely punctured, and the lobe more deeply emarginate at middle ; 

 tibiae not mucronate at apex, and the tarsal claws similar on all 

 feet, cleft near the middle, the inner tooth short, and not turned 

 inward. 



Length, 6.5-9.25 mm. ; width, 1.5-2.5 mm. 



