220 J. L. LECONTE, M. D. 



Now York, collections of Dr. Horn and myself. The differences 

 are so obvious and the other characters so similar that a longer de- 

 scription is not needed. The tip of the abdomen is not darker in any 

 of the specimens I have seen, nor is the suture dusky. 



6. B. flBrrattiS, n. sp. — Brown, not shining, antennte, legs and elytra paler: 

 mandibles with the apical j>art compressed, gradually narrowed from the tooth 

 to the tip; tooth compressed, short, acute; epistoma slightly convex; frontal 

 suture feebly angulated, %vith an obsolete cusp at the middle; supra-antennal 

 ridges short, broad ; back part of head rather strongly but sparsely punctured, 

 line of vertex short. Prothorax rather strongly punctured, dorsal line deep. 

 Elytra finely but more distinctly punctured than in the preceding four species, 

 ventral segments more densely punctulate than in them; dorsal segments 

 sparsely punctulate. Submentura excavated, with a small median elevation; 

 submental suture straight, gula very deeply longitudinally impressed. Length 

 7.5 mm ; .30 inch. 



%. — Eighth ventral segment with a deep narrow incision, closed by mem- 

 brane. 9. — Eighth segment rounded at tip. 



San Diego, Gala, ; three specimens, collected by Mr. G. R. Crotch ; 

 varies uniform yellowish-brown. 



7. B. jacobinilS, n. sp. — Brown, not shining, antennte, legs and elytra 

 paler; mandibles with the apical part compressed, gradually narrowed from 

 the tooth to the tip; tooth not large, acute; head as in the preceding, except 

 that the frontal suture is straight; prothorax strongly punctured, dorsal line 

 entire. Elytra finely but more strongly punctured than in B. ferratus ; dorsal 

 and ventral segments as in that species; submentum with a small circular 

 impression; submental suture straight, gula deeply impressed longitudinally. 

 Length 4,8—7 mm ; .19— .27 inch. 



-^ . — Seventh ventral segment broadly emarginate. 9- — Seventh ventral 

 truncate; eighth segment rounded in both sexes. 



San Diego, Gala. ; five specimens, Messrs. Grotch and Hardy. 



Group 2. — nrmatus. 

 In this group the side margin of the prothorax is distinct, and the 

 prosternal sutures are obliterated; the fissure of the anterior coxal 

 cavities is always closed. The submentum is flat, never excavated, 

 and the longitudinal gular line is well-impressed. The mandibles are 

 stout, not very long, with one or two broad teeth on the inner side; 

 the apical part is rather short and not slender. The front and middle 

 tibiae are compressed, fringed with long spines arranged in widely 

 separated rows. The sides of the prothorax are nearly parallel for 

 three-fourths the length, then strongly rounded to the base, without 

 any hind angles. The sculpture of the prothorax is coarse, and the 

 elytra are usually strongly punctured. The dorsal surfiice of the 

 abdomen is nearly smooth, the ventral is densely but finely punc- 

 tured. 



