34 Trans. Acad. Sci. of St. Louis. 



10 — Abdomen blackish, brightly rufescent at tip. Body moderately stout, 



polished, the head black: prothorax and elytra dark rufous; legs pale 

 flavate, the antennae somewhat dusky rufous toward base; head large, 

 longer than wide, parallel, arcuate and somewhat inflated behind the 

 eyes especially in the male, where it is much wider than the elytra, only 

 slightly wider than the latter in the female; tumescent posterior longi- 

 tudinal ridge at each side distinct; punctures coarse and deep, mod- 

 erately close-set; prothorax only slightly elongate, much narrower than 

 the head, parallel at the side^, the punctures coarse and rather sparse; 

 elytra unusually small in size, but little longer than wide, parallel and 

 straight at the sides, equal in length to the prothorax in the female 

 and rather shorter in the male and only a fourth or flfth wider, very 

 coarsely, deeply, rather closely punctate, the punctures scarcely at all 

 seriate, each elytron however with two approximate sets of series each 

 enclosing a tolerably distinct smooth line ; abdomen fully as wide as the 

 elytra, sparsely and strongly punctulate. Male with an unusually 

 long straight setose discal fold occupying median sixth of the second 

 ventral, the third with a moderate circular setose fovea, the apical lobe 

 parabolic, not extending quite to the apex of the fourth segment and 

 one-third as wide as the apex, bristling with long setae, the sixth 

 ventral conical, evenly, transversely convex, rather narrow at tip, the 

 latter obtu^-ely and broaily rouiided. Length 10.5 mm. ; width 1.55 mm. 



North Carolina and Maryland carolinnm Er. 



Abdomen uniform in color throughout 11 



11 — Body and legs very pale flavo-testaceous in color throughout, the head 



black; abdomen very broad, fully as wide as the elytra. Form stout, 

 parallel; head large, about as wide as the elytra, parallel and slightly 

 arcuate at tiie sides behind the eyes, the tumescent lateral ridge feeble; 

 antennae very slender, the seventh and eighth joints in the male about 

 two and one-half times as long as wide, ninth not quite twice as long 

 as wide; punctures rather coarse but decidedly sparse; prothorax 

 slightly elongate, much narrower than the head, the sides parallel, some- 

 what arcuate anteriorly, the punctures mo.ierately coarse, rather feeble 

 and sparse; elytra only slightly longer than wide, parallel and straight 

 at the sides, a fifth longer and one-third wider than the prothorax, the 

 punctures notably coarse, deep, moderately close-set and subserial, 

 the disk shaded slightly darker in color toward the suture; abdomen 

 strongly, not closely, evenly punctulate. Male with a straight trans- 

 verse setose fold occupying median seventh of the second ventral, the 

 fovea of the third unusually large, a fourth or flfth as long as the entire 

 segment; lobe completely obsolete in specimens at hand, the sixth 

 ventral obtusely rounded at tip. Length 9.0 mm.; width 1.6 mm. 



Illinois.. atriceps n. sp. 



Body dark and more or less obscure rufous in color, the head darker; legs 

 more or less pale flavate as usual, the antennae more or less infuscate; 

 abdomen narrower than the elytra .12 



12 — Form moderately stout, parallel; head not quite as wide as the elytra, 



the sides parallel and straight behind the eyes for some distance, then 

 broadly arcuate to the neck; punctures rather coarse, deep and close- 

 set, separated by scarcely their own diameters; prothorax much narrower 



