282 G. H. HORN, M. D. 



clothed with brownisli hairs. Body beneath and legs blnck, fiuely punctured 

 and sparsely pubescent. Length .28 — .34 inch; 7 — 8.5 mm. 



Male. — Antennce distinctly serrate, apices of elytra with yellow space irregu- 

 lar in outline in front, scarcely more convex or more smooth than the rest of 

 the elytra and not impressed. 



In several specimens before me, tlie elytra arc entirely rufous, less 

 brilliant than the thorax. The apical space still reniains paler. 



This species occurs abundantly in many parts of California. Those 

 from the neighborhood of San Francisco have been sent me by Mr. 

 Jas. Behrens, who informs me that they occur with /uiieLris, on 

 flowers of various Composita3. 



C. terminalis, Say, Jour. Acad. V, p. 247 ; Bost. Journ. I, 189 ; guttula, New. 

 Ent. Mag. V, 375 ; Lee. Proc. Acad. 1855, p. 273. — Black, shining. Head and 

 tliorax shining, the latter rufous and with very sparsely placed punctures. 

 Elytra black, rather shining, coarsely but not very closely punctured. Body 

 beneath and legs black and sparsely punctulate. Length .24 — .30 inch ; 5 — 7.5 

 mm. 



Male. — Antennae not at all sub-serrate, apices of elytra with a rounded, ele- 

 vated, smooth yellow space not impressed. 



This species may readily be known among those with red thorax 

 and black legs^ by its much more shining elytra, and with a very sparse 

 pubescence. Some well preserved specimens have a slightly glaucous 

 blue color to the elytra. 



This is the most abundant species in the Middle States. 



C. collaris, Say, Jour. Acad. V, p. 246, $ ; Lee. Proc. Acad. 1855, p. 271 ,• im- 

 pre.isus, Say, loc. cit. p. 248, % ; Lee. loc. cit. 273; tnaryinicollis. var. Zieg. Proc. 

 Acad. II, p. 47 ; rufiihorax, Newm. Ent. Mag. V, 375; mfvmatuH\\iii(i. Jour. 

 Acad. Sci, II, Vol. I, p. 83. — Black; moderately shining. Head scarcely punc- 

 tulate. Thorax rufous. Elytra black densely punctured, sparsely clotheil 

 with short pubescence. Body beneath and legs black, and sparsely ])uuctulate. 

 Length .18— .28 inch; 4.5—7 mm. 



Jifa/e.— Apices of elytra, with elongate impression near the suture and attain- 

 ing the apical angle. 



The elytral sculpture is similar to the preceding species but the 

 punctures are smaller and more closely placed. The females of 

 coUdris and terminalis, very closely resemble each other and can only 

 be distinguished by the slight diiferences in punctuation and by the 

 elytra of the latter being rather more shining and less pubescent. 

 As will be seen in the synonyms above I have united im2)ressu.-;, Say, 

 with this species. 'J'he remarks of Say, lead to the inference of their 

 identity and I have lately seen specimens caught under circumstances 

 admitting of but little doubt in the supposition that impresaiis, is mere- 

 ly the male of Culhtris. 



C. elegans, Jleiitz, Trans. Am. Phil. Soc. 1830, 257; haanorrhoidalis, Zcig. 



