2:38 THE CANADIAN ENTOMOLOGIST. 



become less regularly concave, and, apically, assume the form of closely 

 crowded convexities, somewhat like the facets of a compound eye. 



The form known in our cabinets as Santaclane, Bates, is a species 

 distinct from vulturina. In the litter the hind body is shorter and more 

 depressed, and the median band is very narrow, extending from the 

 margin obliquely forward, then broken posteriorly at a right angle, 

 extending to about apical third and inner fourth, not enlarging much. In 

 Santaclarct there is a rounded spot just before and another just behind 

 the middle, the latter nearer inner third, the two spots joined by a very 

 fine oblique line ; it occurs with the ground colour pure green, olivaceous, 

 bright coppery brown or smoky black. Obsoleta ( =prasina) is much more 

 elongate, and is always spotless ; it is also a distinct species. 



Under the longilabris group, Mr. L-*ng states that perviridis has the 

 elytra more elongate and convex. The three specimens in my collection, 

 from Placer Co., California, have the elytra narrower and relatively more 

 elongate, though not by any means more convex, but rather more de- 

 pressed, than in longilabris ; their sculpture is notably denser and less 

 coarse; one of them is of a decided blue green. A green California 

 longilabris is similar to the normal Colorado form in sculpture, but is of a 

 much brighter and purer green than my representatives of perviridis, which 

 may therefore not be entirely typical. My single example of montana, 

 Lee, is slightly smaller, shorter and stouter than the typical longilabris, 

 the prothorax notably shorter, the median mark of the elytra finer and 

 shorter, bent at right angles and the sculpture normal ; it is from Alberta. 

 I regard moiitana as, at any rate, a very well-marked subspecies of 

 'longilabris, if not distinct. The following is another subspecies generally 

 confounded with montana : 



C. Nebraskaua, n. subsp. — -Form very much more slender than in 

 longilabris, and still more so than in montana, deep black throughout 

 above and beneath ; labrum similar though rather shorter, deep black 

 throughout in the female; third antennal joint with rather stiffer external 

 spines ; head similarly concave ; prothorax similar but relatively smaller, 

 scarcely as wide as the head ; elytra narrower, nearly three-fourths longer 

 than wide, almost similarly sculptured but with the surface between the 

 coarse and well separated punctures much more shining, without trace of 

 pale marking of any sort. Length, ?, 13.0 mm.; width, 4.9 mm. Nebraska. 



In the uigroccerulea group there are many forms, some specific and 

 others sub-pecific or racial ; thus far only a few of them have been 



