50 Journal New York Entomological Society. [Voi xviii. 



allowing for a moderate amount of individual variation it is probable 

 that the tibia is never deeply sinuate, as it is described to be by Horn, 

 who, I think, must have mixed individuals of two species. The 

 prosternum of the male is sparsely punctate or nearly smooth along 

 the middle, a rare character in this group and one that does not 

 obtain in any of the other species here tabulated. Typical carini- 

 pcnnis is bright green beneath, and it is by no means certain that 

 the specimens with under side bronzed or coppery are identical ; these 

 should receive further study. 



C. sylvania, new species. 



Closely allied to trinervia, but rather broader and heavier, the color 

 beneath bright green in the male, dark green with cupreous reflections in the 

 female ; prothorax as abruptly or even more abruptly narrowed behind than in 

 front ; elytral costse not as distinctly elevated as in typical trinervia, the 

 smooth spaces sharply defined, the punctured areas more densely punctate than 

 in trinervia; sexual characters as in trinervia. Length ii. 5-1 1.8 mm.; width 

 S-5.1 mm. 



Described from two males and two females collected by Mr. 

 L. E. Ricksecker at Sylvania, California. Two of the four specimens 

 differ a little from the type pair but are probably identical. 



C. caurina Horn. 



The form of the apical dilatation of the front tibia of the male, 

 and of the apex of the last ventral of the female are peculiar to this 

 species. This last does not seem to me to be very aptly described 

 by Horn, who says in his table that there is " a well-marked trans- 

 verse ridge in front of the notch." This apical ridge or carina con- 

 sists of the free edge of the terminal portion of the submarginal 

 serrate ridge, which is feebly developed laterally, leaving the apical 

 portion where it cuts across the bottom of the emargination, smoothly 

 outlined and a little deflexed, and is best seen when looked at from 

 behind and nearly in the axial line of the body. 



There are in the collection of Dr. Fenyes and myself some fifteen 

 examples which I refer to caurina, as the sexual characters are 

 virtually identical, yet not one of them is exactly like the typical 

 examples sent me for examination by Dr. Skinner. Further study 

 with sufficient material may show that our aggregate under this name 

 is composite. 



