KEY. T. A. MARSHALL CORTNODIKOEUM RECENSIO. 49 



Discovered by M. Mouliot, and in tlie collections of the Eev. 

 H. Clark and Mr. Baly. 



Tlie following species are from North America ; they are some- 

 what more elongate in form, but possess no characters sufficiently 

 salient to justify the establishment of a new genus. 



5. C. ATJRATUS, Fah. 

 Fab. Ent. SysL i. 325. 87; El i. 419. 6. Oliv. 903, pi. 1. fig. 12. 



T. W. Harris, Massachusetts Reports, Insects, p. 108. 

 Hab. United States. Common in collections. 



6. C. coBALTiNus, Lec. 

 Leconte, Reports of Surveys Sf-c. no. 1. p. 67. 

 Hab. Oregon and California. 

 In the collections of the Eev. H. Clark and the British Museum. 



7. C. Californicus. 



C. elongatus, cylindricus, eaeruleo-vii'idis, metallicus; oculis rufis, an- 

 tennis piceis ; thorace subtiliter punctulato, punctis majoribus inter- 

 jectis, antice gibboso, lateribus rotundato-ampliatis, basin versus 

 subrectis, angulis posticis rectis ; elytris confertim punctulatis ; scu- 

 tello Isevi, purpureo ; pedibus cEeruieo-viridjbus. 



Long. 5 lin. ; lat. hum. 2\ lin. 



This and the two next are allied to C. cobaltinus, Leconte. The pre- 

 sent species differs from that insect in being somewhat larger, and of 

 a shining bluish-green colour, instead of dark blue. The thorax is 

 broader in proportion, much more gibbous at the sides and in front, 

 and more profoundly punctured. The underside and legs are con- 

 colorous, thinly scattered with short pale ferruginous hairs ; the claws 

 are pitchy. — Hab. California. 



8. C. TENEBEICOSFS. 



C. prsecedenti afflnis, totus ater, minus nitidus; thorace antice parum 

 gibboso, lateribus reetis, basin versus vage et fortiter punctato, prae- 

 sertim apud angulos posticos. 



Long. 5 lin. ; lat. hum. 2^ lin. 



Distinguished from the preceding, and from cobaltinus, Leconte, by the 

 thorax, which is neither gibbous in front nor laterally dilated. The 

 scutellum is brown, shining, and impunctate. The elytra are broader 

 in proportion to their length than those of Californicus, but similarly 

 punctured. The entire insect is of a black colour, slightly tinged 

 with dull blue, and on the elytra, in certain lights, with purple. 



Hab. California. 



9. C. CASTANEFS. 



C. elongato-ovatus, subdepressus, su]}ra saturate castaneus, nitidus, 



punctulatus ; subtus testaceus ; antennis pedibusque castaneis. 

 Long. 4 lin. ; lat. hum. If lin. 

 LIWliT. PEOC. — ZOOLOGY, VOL. VIII. 4 



