410 ENTOMOLOGICAL NEWS. [Nov., 'l6 



$ . Prosternum densely and finely punctured and rather densely 

 pubescent;; anterior tibia arcuate, somewhat suddenly constricted at 

 junction of middle with outer third, then abruptly dilated, the dilata- 

 tion being a lamina arising from the posterior side which forms an 

 arcuate enlargement that is distinctly constricted apically ; middle tibia 

 less arcuate, gradually broader to tip, the posterior tibia straight; last 

 ventral segment broadly semi-circularly emarginate, the last dorsal 

 sparsely punctate at middle, more densely at sides and with a triangu- 

 lar emargination. 



5 . Prosternum more coarsely and sparsely punctured and sparsely 

 pubescent ; anterior tibia moderately arcuate, gradually wider to tip, 

 the middle almost straight and slightly wider toward tip, the posterior 

 straight ; last ventral longer than in male and with a small semi-circular 

 emargination, last dorsal more punctate at middle than in the male and 

 with a small apical notch ; the under surface, head, antennae, and legs 

 being more cupreous than in the male. 



This species superficially has the facies of C. femorata Fab. 

 and because of the greenish under surface and head, especially 

 in the male, might be confused with C. carinipcnnls Lee. and 

 C. pseudotsugae. It, however, differs from the latter two as 

 regards the prosternal characters of the male as well as the 

 type of tibial dilatation. Among the Pacific species, it would, 

 according to its characters, come closest to C. sylvania Fall, 

 but it has quite a different facies and besides has a different 

 type of male tibial dilatation. In fact the only western species 

 which has the same type of male tibial dilatation is C. canrina 

 Horn, a species which belongs in the series possessing a lobed 

 prosternum. 



My series contains eleven specimens, nine collected on the 

 western larch, Larix occidentalis Nutt., and one on the lodge 

 pole pine, Finns contorta var. murrayana Balf., in Grant 

 County, Oregon, during various days in July, 1914, by Mr. 

 W. T- Chamberlin, and one collected by Mr. E. P. Van Duzee 

 at Angora Lake, near Lake Tahoe, California, July /, 1915, 

 presumably on the lodge pole pine. I have also examined an- 

 other and even greater series of specimens collected by Mr. 

 Chamberlin which is now at the Oregon Agricultural College. 

 This species seems to belong in the northern part of the Great 

 Basin and normally on the larch and lodge pole pine, and to 



