1856.] 27 



C. quadricollis Kirby, Fauna Bor. Am. 4, 22. Probably C. pensyl- 

 V a n i c u s . 



C. f u 1 g i c e p s Newm. Ent. Mag. 5, 490. Probably C. pensylyanicus. 



C. oxygonus Chaud. and C. longi colli s Cliaud. Bull. Mosc. 1843. Pro- 

 bably varieties ofC. tricolor or C. brevilabris. 



Dinodes rottindicollis Dej. Probably not North American. 



The species in parentheses are unknown to me : the characters above given 

 of them are taken from the original descriptions. 



Notes and Synonyms. 



1. C. posticus Lee. Mels. Cat. 13. is C. apicalis\^ Lee. Ann. Lye. of Nat. Hist. 

 5, 179. 



4. C. aestivus Say, Trans. Am. Phil. Soc. 2, 62 ; C. cobaltinits Dej. Sp. Gen, 

 2, 331 ; var. C. congener Lee. Proc. Acad. 2, 51 ; Ann. Lye. 4, 435. 



5. 0. p u s i 11 u s Say, Trans. Am. Phil. Soc. 2, 63 ; C. elegantulus Dej. Sp. Gen. 

 2, 367. 



9. C. erythropus Germ. Sp. Nov. 11 ; C. rufilabris Dej. Sp. Gen. 2, 329. 



12. C. rufipes seems to vary much in the form of the thorax; the variety 

 or race with the thorax short, more rounded on the sides, and the posterior angles 

 obtuse is C. brevicolUs Lee. Ann. Lye. 4, 432. Many entomologists are disposed 

 to receive it as a difierent species, but similar variations seem to occur in C. 

 sericeus. 



13. C. lithophilus Say, Trans. Am. Phil. Soc. 2, 62 ; C. viridanus Dej. Sp. 

 Gen. 5, 660. 



14. 0. augustus Newm. Ent. Mag. 5, 490; C. Lecontei Hald. Proc. Acad. 1. 

 304. 



15. 0. sericeus Say, Trans. Am. Phil. Soc. 2, 61: Dej. Sp. Gen. 2, 347. 

 Carahus sericeus Forster, Cent. Ins. 58, varies somewhat in the form of the thorax; 

 a specimen in which the sides are more rounded than usual, and the anterior 

 angles are considerably defiexed, is G. perviridis Leo. Ann. Lye. 4, 434. This 

 species is found from Maine to Oregon, and as far south as Texas. 



19. C. leucoscelis Chevr. Col. Mex. 1st cent. ; C. monachus Lee. Ann. Lye. 

 5, 180. 



23. 0. nemoralis 5'ff?/, Trans. Am. Phil. Soc. 2, 65. It is doubtful whether the 

 species described under this name by Kirby, (Fauna Bor. Am. 22) is really this; 

 the expression 'thorax densely punctured' seems to indicate that C. tricolor 

 is meant. 



24. C. pensyl vanicus Say, Trans. Am. Phil. Soc. 2, 66. C. jmlescens 

 Harris, New England Farmer, 1828; C. vicinus Dej. Sp. Gen. 5, 659. This species 

 varies slightly in the form of the thorax, but may be easily distinguished from 

 the allied species, by the rough and distinctly punctured interstices of the ely- 

 tra, while the stria; are only faintly punctured. C. fulgiceps Newm. and C. 

 quadricollis Kirby, are perhaps to be added to the synonyms of this, but the 

 descriptions are very unsatisfactory. Mannerheim states that this species is found 

 in California, but I have not seen any specimens from the regions west of the 

 Rocky Jlountains. 



25. C. tricolor Dej. Sp. Gen. 2. 334. Specimens of this species were found 

 by me at Tucson, in Northern Sonora, and at San Diego, California ; they differ 

 from those found on the Atlantic slope of the continent, by the thorax being 

 shorter and more rounded on the sides, 



26. C. brevilabris Lee. Ann. Lye. Soc. 4, 437. Differs from C. t r i c o 1 o r 



