12 J. L. LECONTE, M. D. 



5. K. riibriventris. — Red, head, elytra and postpectus black; prothorax 

 longer than wide, narrowed with rounded sides from the middle to the tip, disc 

 finely densely punctured, hind angles bicarinate, prosternum red. Antennae not 

 longer than prothorax, strongly serrate, 3d joint equal to 2d, united equal to the 

 4th, brown. Elytral strise deep, interspaces convex, rugosely punctured ; 8 mm. 

 One specimen collected near Las Vegas, New Mexico, by Prof. F. H. 

 Snow. 



7. K. inelinus — IhiU yellow, with yellow pubescence. Head, scutel. post- 

 pectus and antennre black, the last are half as long as the body, slender, 3d joint 

 but little longer than 2d ; prothorax hardly longer than wide, narrowed from the 

 base, deeply but not coarsely or densely punctured, angles bicarinate. Elytral 

 striae punctured, well impressed, interspaces nearly flat, punctulate; 7 mjn. 

 Clark's Station, (yalifornia ; one specimen collected by Mr. A. Bolter. 



14. E. ater. — Entirely black, not opaque, pubescence black, erect on the pro- 

 thorax, which is longer than wide, slightly narrowed and rounded near the apex, 

 densely not coarsely punctured, angles unicarinate. Antennse as long as prothorax, 

 not strongly serrate, 2d and 3d joints equal united as long as the 4th ; S.5 mm. 

 Manitou, Colorado ; one specimen collected by Mr. A. Bolter. 



Ifi. f2. longicoriiis. — More elongate than usual, brown with grayish pubes- 

 cence. Antennae half as long as the body, joints long, 2d and 3d united as long as 

 the 4th ; prothorax longer than wide narrowed from the base, very slightly rounded 

 on the sides, angles divergent, unicarinate, disc deeply not coarsely nor densely 

 punctured. Elytral striae composed of fine punctures, interspaces Hat sparsely 

 punctulate; 9 rnm. 



Santa Anna Biver, California ; one specimen collected by Mr. Bolter. 

 Resembles greatly Melanotus longulus. 



33. E. Slibtilis. — Black, clothed with very fine short brown pubescence. An- 

 tennae and legs brown, the former not longer than prothorax, moderately serrate, 

 2d and 3d joints equal; prothorax finely densely punctured, slightly longer than 

 wide narrowed from the base forwards, slightly rounded on the sides, angles uni- 

 carinate. Elytra with convex interspaces, densely punctulate ; beneath densely 

 punctulate, prosternum shining finely sparsely punctured ; 7 mm. 



One specimen collected by myself, at Lake Superior ; a very peculiar 

 species by the fineness of the sculpture, havins somewhat the lustre of a 

 Cardiophorus. 



38. E. lateralis. — Black, pubescence dark gray, prothorax finely punctured 

 hardly longer than wide, sides more rounded in front, hind angles unicarinate; 

 deep red, broad dorsal vitta ^nd prosternum black. Antennae shorter than pro- 

 thorax, moderately serrate, 2d and 3d joints united as long as the 4th : 10 mm. 

 Nevada ; one specimen in Dr. Horn's collection. 



41. E. torqiiatus. — Black, precisely similar to lateralis, but the disc and 

 flanks of the prothorax are red ; 1 mm. 



Nevada ; one specimen in Dr. Horn's collection. Perhaps only color 

 variety of the preceding. 



