320 G. H. HORN, iM. D. 



brownish with bright ajneous bronze lustre, sparsely clothed with greyish pu- 

 bescence. Head coarsely punctured, mandibles rufous, black at tip. Antennfe 

 lialf as long as body, feebly subserrate, third joint longer than the second and 

 the two together equal to, scarcely longer than the fourth. Thorax longer tlinn 

 wide, feebly narrowed in front, sides feebly arcuate, slightly sinuate in front 

 of the hind angles which are slightly divergent, sub-acute and not carinate : 

 surface moderately convex, corsely punctured, median line feebly impressed 

 at base. Elytra slender, more brilliant in color than the thorax, striate, strire 

 piinctured, intervals flat, punctulate and slightly wrinkled. Body beneath 

 l>lack, without metallic lustre, closely punctured, legs rufo-piceous,tibije pa- 

 ler. Leu,','th .38 incli ; 10 mm. 



Resembles farsalis and caricinus, in form, but must be referred to 

 anotber group in wbicb the third joint of the antennae is shorter and 

 narrower than the fourth. 



One specimen from the Sierras of CaUfornia. 



C. limoniiformis, n. sp. — Form slender, iseneous, clothed with greyish pub- 

 escence giving the surface a plumbeous appearance. Head coarsely and deeply 

 but rather sparsely punctured. Thorax longer than wide and narrower in 

 front, sides very feebly rounded, subparallel behind the middle, feebly sinuate 

 near the hind angles which are strongly divergent, acute and feebly carinate ; 

 disc moderately convex, median line distinctly impressed behind the middle, 

 surface deeply and rather densely punctured. Elytra as broad as thorax grad- 

 ually narrower to apex, surface moderately convex, rather deeply striate, striae 

 punctured, intervals feebly convex and rugosely punctulate. Body beneath 

 darker than above, less distinctly ajneous, punctulate and with greyish pubes- 

 cence. Legs piceous. Antennae with the third joint shorter and more slender 

 than the following. Length ,38 inch; 9.5 mm. 



Allied to divaricatus^ but more slender and with longer thorax, and 

 with a surface more distinctly metallic ; also resembles the more 

 slender forms of cijUndri/ormh, % , the color being, however, darker 

 and its thorax more deeply punctured^ differing as well as by its more 

 (ionvex form. 



One specimen in the cabinet of Mr. Ulke, from Dacota. 



GROUP IV. 

 C. pruininus, n. sp. — Black, feebly shining, surface sparsely clothed with 

 abort grey hairs and consequently pruinose in aippearance. Head coarsely 

 punctured, cribrate. Antennae with third joint longer than the following. 

 Thorax slightly longer than broad, surface convex, densely and rather coarsely 

 punctured, punctures confluent at the sides; apex feebly emarginate, sides in 

 front rounded, feebly sinuate near the hind angles which are acute, feebly di- 

 vergent and strongly carinate. Elytra as broad as thorax, moderately convex, 

 sides nearly parallel at basal two-thirds then gradually narrower to apex, sur- 

 face feebly striate, striae punctured, intervals flat, sparsely but rugosely punc- 

 tured, but smoother in tlie basal and scutellar region. Body beneath black 

 sparsely punctulate and clothed _with greyish hairs. Legs piceous black. 

 Length .52 inch ; 13 mm. 



Allied to conjungens, Lee., from which it differs in color, size 



