NORTH AMERICAN OOLEOPTERA. 91 



111 the more iiortlieru specimens (from New England States, 

 Canada and northward) the individuals are usually smaller and with 

 the elytral costae well marked often entire, the thorax is also often 

 slightly narrowed from the post apical dilatation to the base, while 

 in the southern and western forms the thorax is in shape quite like 

 femorata. The color beneath is always brassy or cupreous, those 

 mentioned by LeConte as entirely green beneath belong to ccmrina 

 or carmipennis. 



Occurs from the Hudson's Bay region through Canada and the 

 New England States as fer south as North Carolina ; from the Mid- 

 dle States it extends westward to Colorado, New Mexico, thence to 

 Utah, and to Alaska. I have never seen specimens from our Pacific 

 States. 



20. C. cariiiipennis Lee. — Form rather more elongate than femorata, 

 piceous, the ]iunctured spaces dark bronze or coppery, body beneath either sene- 

 ous or sometimes entirely green ; antenuse aeneous in both sexes, gradually more 

 slender to the tip, third joint as long as the next two; front rather flat %, 

 densely punctured and somewhat greenish or slightly convex J niore coarsely 

 punctured and feneous with feeble callosities; clypeus (101) rather broadly tri- 

 angularly emarginate, on each side arcuate ; thorax twice as wide as long, nar- 

 rowed at apex and base, at middle nearly parallel ; disc feebly convex, a distinct 

 broad median channel densely punctured, limited each side with a more elevated 

 smoother space, near the front angles a smooth space, the surface otherwise 

 densely and coarsely punctured ; elytra a little wider than the thorax, sides par- 

 allel, gradually narrowed at apical third, sides feebly serrulate, apices obtuse, 

 disc feebly convex, the first costa nearly entire, the second and third distinct but 

 interrupted by the punctured spaces, the fourth finely elevated, intervals with 

 alternating densely punctured and smooth spaces conjointly of nearly equal 

 areas, the basal fovea not deep ; body beneath not densely punctured, the punc- 

 tures somewhat elongated , prosternum not lobed in front ; anterior femora with 

 a moderate tooth very feebly serrulate on distal edge ; last ventral segment with 

 serrulate margin. Length .36- .50 inch ; 9-12.5 mm. (Fig. 100.) 



Male. —Prosternum coarsely and moderately densely punctured, sparsely pubes- 

 cent; anterior tibia (104) arcuate and with a deep sinuation one-third from the 

 apex and a dilatation from the posterior border of the tibia from the emargina- 

 tion to the apex ; middle tibia slightly arcuate and feebly dilated at tip, the pos- 

 terior straight ; last ventral segment (102) deeply semi-circularly emarginate, the 

 last dorsal moderately punctate, feebly emarginate at apex. 



Female. — Prosternum very coarsely punctate at the sides nearly smooth at 

 middle ; anterior and middle tibiae very feebly arcuate, the posterior .straight ; 

 last ventral segment (103) longer than in the male, the apex with a scarcely per- 

 ceptible truncation, usually with a slightly elevated serrulate ridge in front of 

 the apex, last dorsal coarsely sparsely punctate, a small triangular emargination 

 at apex. 



