THE CANADIAN ENTOMOLOGIST. 269. 



described, such as the original LeContean species, and, more lately, rubusta 

 and Bowditchi by Leng. The following is a mountain modification of 



nigroccerulea : 



C. feminalis, n. subsp. — Very deep purplish-blue, pervaded with large 

 clouds of bluish-black, sericeous, brighter violet-blue and polished beneath, 

 with sparse white hairs at the sides of the body and on the legs; head 

 finely strigilate between the eyes, impunctate and nude anteriorly, the 

 labrum finely tridenticulate, with the median tooth more prominent, pale, 

 infumate basally and apically ; labial palpi very pale ( $ ) or dark piceous 

 ( $ ), the apical joint black ; prothorax a fourth wider than long, about as 

 wide as the head, margined laterally with a few decumbent white hairs ; 

 elytra ( <$ ) impressed longitudinally near the suture and with an entire 

 row of foveolse, also a short line of the latter in the intrahumeral impression, 

 the punctures feeble but evident, less marked apically. Length, c£ * $ , 

 10. 5-1 1.8 mm.; width, 4.2-4.8 mm. Colorado (Las Animas). 



In the female the elytra are much more inflated than in the male, and 

 their surface, instead of being uniform in its sericeous lustre throughout, 

 as in that sex, has each a small oblique impression near the suture rather 

 before basal third, which impression is polished and densely, deeply and 

 very distinctly punctate ; the longitudinal impression and the foveas also 

 are almost obsolete. This suljspecies is smaller than nigroccerulea — 

 1 2.5-14.25 mm. — and, although similar in having only a small transverse 

 white streak at the elytral apices, apparently has the prothorax more 

 transverse. 



The foliowing three are also modifications of nigroccerulea, but are 

 more closely allied to the robusta type. They are all of a sericeous-green 

 colour above, more shining deep blue beneath, with more or less green 

 legs. They may be defined as follows, — from the male in each case : 



C. Snowi, n. sp. — Rather slender, moderately convex, the general 

 structural characters and setae as in nigroccerulea ; head much more 

 coarsely strigose toward the eyes than in any other allied form ; prothorax 

 feebly obtrapezoidal, with nearly straight sides, evidently narrower than 

 the head, and but slightly wider than long, with two close-set and rather 

 regular series of coarse punctures near each side margin ; elytra one-half 

 longer than wide, with the usual line of fovea? but without the subsutural 

 impression, the punctures strong, relatively rather coarse, blue in colour, 

 and somewhat lucidogranuliferous, becoming simple and subobsolete 

 apically ; each elytron has a pale spot on the humerus, another externally 



