27 -f THE CANADIAN ENTOMOLOGIST. 



would seem to approach the Group H, defined by him (Tr. Am. Ent. Soc, 

 1902, p. 116): 



C. Coc/iise/tsis, n. sp. — Moderately slender, rather convex, strongly 

 shining, bluish-green to wholly or in part deep cobalt-blue throughout ; 

 head not very finely strigilate, the frontal swelling closely punctate and 

 with stiff erect white setie ; labrum pale, with the apical and basal margins 

 narrowly piceous, the apex approximately bilobed, with a short and 

 broadly angulate median tooth not projecting beyond them ( J ), or more 

 evenly arcuate, with a more prominent median tooth ( ? ) ; prothorax a 

 little narrower than the head and slightly wider than long, narrowed 

 basally, the sides broadly rounded ; surface convex, deeply impressed, 

 polished and only feebly wrinkled, with a very few coarse white lateral 

 hairs, the sides margined ; elytra parallel, more than one-half longer than 

 wide, wholly immaculate, with rather strong and well-separated simple 

 punctures, which are only slightly smaller apically ; under surface with 

 numerous long coarse white erect hairs laterally on the propleura, much 

 shorter, white, and subdecumbent but numerous along the sides of the 

 abdomen; anterior tarsi ( £ ) very narrowly dilated; hind tarsi but little 

 longer than the tibia-. Length, £ , ° , 10. 7-1 1.8 mm.; width, 4.0-4.7 mm. 

 Arizona (Douglas). 



I am unable to identify this with any Mexican species, and assume 

 that it is quite local in the southern part of Cochise Co., Arizona. 



The three following very small forms were collected by Mr. C. H. T. 

 Townsend at Colonia Garcia, Sierra Madre Mts., Mexico, and have a 

 common type of organization, with feeble and subobsolete sculpture; they 

 are wholly glabrous throughout on the under surface : 



C. fi/itarsis, n. sp. — Slender, moderately convex, alutaceous, dark 

 greenish-blue above, more violaceous beneath ; head almost even, finely 

 strigose except along the middle, the front bald, the slope smooth; labrum 

 sinuously oblique at each side of the. frontal margin, the median advanced 

 part obtusely tnlobed and but little more than half the total width ; pro- 

 thorax small, slightly narrowed basally, rounded on the sides and 

 distinctly wider than long, the marginal line indistinct, the surface convex, 

 very finely, feebly sculptured, the anterior impression very feeble ; elytra 

 parallel, not very obtuse at apex, the sutural angles not modified, the 

 surface wholly immaculate, finely, not very densely, subevenly but very 

 feebly punctate; tarsi long and very slender. Length, £ , 8.5 mm.; 

 width, 3.1 mm. Mexico (Chihuahua). 



