146 CUKCULIOXID^. [LeConte. 



nate interspaces elevated; two transverse denuded bands reach neither suture 

 nor margin; beneath gray pubescent, with blacli dots. Length 11.5 mm.; 

 .45 inch. 

 California: one specimen, given me by Mr. A. Murray. 



2. C. annularis. Cleonus anrj. Lee. Col. Kansas, p. 18, pi. 1, f. 13. 

 Kansas: specimens in my collection and in Dr. Horn's ditFer from the 



preceding by the hairs intermixed with the pubescence being short; the 

 beak is more strongly carinate, the sides of the prothorax less sinuate, and 

 the alternate interspaces of the elytra scarcely elevated. 



3. C. porosus, n. sp. 



Black, clothed with grayish and yellowish pubescence, with short hairs 

 intermixed; beak coarsely punctured, with a feeble short caruia at the mid- 

 dle, and two short shallow grooves ; sides of prothorax nearly straight 

 behind the postapical angle; elytra with rows of very large punctures, 

 interspaces scarcely unequal; two indistinct darker transverse bands. Length 

 11.5 mm.; .45 inch. 



One specimen. Cape San Lucas, Lower California, Mr. Xantus. The 

 elytral stricE are composed of larger and less approximate punctures than 

 in C. angtilaris. 



4. O. molitor. Cleonus molitor Lee. Proc. Acad. 1853, 78. 

 California and Arizona. The pubescence is very dense, and scale 



like, not mixed with hairs, and is very easily abraded. The sculpture is 

 much less coarse than in the other species, and the postapical angles of the 

 prothorax are less prominent. 



STEPHAN0CLI30NUS Motsch. 

 The essential characters of this genus consist in the prostcrnum without 

 spines in front of the coxse, the postapical angles of the prothorax obtuse 

 or rounded, not at all prominent as in Centrocleonus ; the antennae are 

 stout, feebly geniculate; first joint of funiculus lougei*, second only equal 

 to the third, seventh forming part of the club. Beak rather stout, strongly 

 carinate; tarsi hairy beneath, not spongy (except the third joint of the 

 front and middle pairs); hind tarsi with first and second joints elongated, 

 third shorter, emarginate, not bilobed, claws connate at base. 



Humeri obliquely truncate 1. plumbeus. 



Humeri rounded 2. oristatus. 



1. S. plumbeus, n. sp. 



Black, thinly clothed with nearly unifortu whitish fine pubescence, pro- 

 ducing a leaden lustre; beak stout, shorter than the prothorax, strongly 

 carinate, carina extending upon the head, but not to the tip of the beak; 

 broadly sulcate each side, separated from the head by a transverse con- 

 cavity, confluently and finely punctured, lateral space in front of the eyes 

 with a few very large punctures. Prothorax quadrate, suddenly narrowed 

 near the tip, and transversely impressed at the sides, postocular lobes 

 scarcely fringed, postapical angles rounded, sides nearly parallel, base 

 broadly emarginate in two arcs of a circle, middle angle not rounded; disc 



