84 Natural History Bulletin. 



indistinct or sometimes absent. Elytra with humeral ridges 

 not spinous. Abdomen with the basal median fovea not half 

 as wide as the lateral. The ? has the clypeus remarkably flat, 

 strongly punctured laterally, less so in the middle, not sepa- 

 rated from the frontal margin. Median basal abdominal fovea 

 wider; tenth antennal joint not modified. 

 Habitat. Cincinnati, Ohio. 



B. PUNCTiFRONs, Casey. Red-brown to black, impunctate, 

 pubescent, antennee, legs, and palpi dull-red. Length 1.8 to 

 1.9 mm. 



Head carinate at the sides of the vertex, fovege nude, cir- 

 cumambient sulcus interrupted in front, where the frontal ele- 

 vation is connected with the rather flattened median arch; 

 between the occipital foveas is a transverse impression; the 

 frontal margin is densely punctured, anteriorly declivous to 

 the interantennal line, the decHvous portion triangular, sHghtly 

 truncate in front; sub-frontal groove very narrow^ sharply cut; 

 clypeus conical, edges not reflexed, densely punctured. 

 AntemicB with the first joint as wide as the tenth, one-half 

 longer than wide, the joints gradually decreasing in size to the 

 eighth; eighth transversely oval, ninth and tenth not longer 

 than the eighth, gradually wider, shorter inside, with the usual 

 perforate fovea on the tenth; eleventh more than twice as 

 wide as the tenth, and larger than the three preceding joints 

 together, ovate-acuminate. Prothorax with the median sulcus 

 fine, perceptible only in a favorable light, stronger near the 

 fovea, spines ver}- small and fine. Abdominal basal foveas 

 nearly equal. The ? differs in the vertex being uniformly 

 convex and scabrous; the antennae are of the same form as in 

 the 5. 



Habitat. Southern Penns3'lvania. 



