LeConte.] BA1UX1. 291 



but not concave in front of them. The head is nearly smoo'.h, the beak 

 coarsely punctured, short and curved; the club of the anienrue is round, 

 with first joint shining. Prothorax ample, rounded on the sides, more 

 suddenly narrowed and feebly constricted in front; punctures of usual si/e, 

 smooth dorsal line distinct. Elytra very li'.tle wider than prothoni.x. -uia 

 very deep, interspaces elevated, flat, each wi h a row of strong punc'.ures, 

 which are approximate and furnished with very small white hairs, more 

 obvious than in any of the following species; they are somewhat confused 

 on the third interspace. 



2. B. umbilicata (Lee.), Pr. Ac. Nat. Sc. Phil. 1868, 363, (ffaridiiis). 

 Two specimens, Pennsylvania. This species resembles the next in every 



respect except that the prothorax is comparatively larger, and the humeral 

 callus of the elytra less prominent. The head is sparsely, the beak strongly 

 punctured, the club of the antennae nearly round, with the first joint shi- 

 ning, Prothorax narrowed in front from the base, and scarcely rounded 

 for two-thirds the length, then suddenly rounded and constricted near the 

 tip; punctures unusually large, umbilicated. Elytra a little wider than 

 prothorax at base, striae very deep, interspaces narrow, elevated, flat, each 

 with a row of strong not approximate punctures. Prosternum very narrow 

 between the coxae, broadly concave and coarsely punctured in front of 

 them. Beneath coarsely punctured, finely sparsely pubescent. Length 

 5 mm.; .20 inch. 



3. B.jgtriatajCSay), Cure, 17; ed. Lee. i, 281; Lee. Pr. Ac. 1868, 362. 

 Michigan, Illinois, Kansas, Arizona. This is one of our largest species 



and is easily recognized by the comparatively smaller prothorax, and more 

 prominent humeral callus. The prosternum is very narrow between the 

 coxae, flat and coarsely punctured in front of them. The antennal club is 

 nearly round and the first joint is shining. Length 5.5-6.5 mm.: .22-.20 

 inch. 



4. B. subovalis (Lee.). Pr. Ac. Nat. Sc. Phil. 1868, 363, (BarMiug). 

 One specimen; "Wisconsin. A rather large species of oval form, and 



shining black color. Head very convex, sparsely punctulate; beak a little 

 longer and less stout than in the following eight species, much curved, 

 constricted at base, strongly punctured. Prothorax narrowed from the 

 base forwards, then more suddenly rounded and narrowed to the tip, which 

 is slightly constricted at the sides ; punctures strong, but not very coarse, 

 more dense at the sides, dorsal line dis'inci. Elytra scarcely wider than 

 the prothorax, humeri rounded, not prominent; striae deep, interspaces flat, 

 finely but distinctly punctulate, punctures of the third interspace confused, 

 of the others in irregular rows. Prosternum uniformly coarsely punctured, 

 longitudinally concave or broadly sulcate in front; front coxa? moderately 

 distant. Antennae with club nearly round and first joint shining. L-ngtli 

 6 mm.; .24 inch. 



r>. B. transversa (Say), Cure. 18, (Baridius); ed. Lee. i, 2 $2: Lee.. 

 Pr. Ac. Nat. Sc. Phil. 1868, 362; B. quadratus Lee., ibid. 361. 



