92 GEO. H. HORN, M. D. 



In sculpture this species occupies an exactly intermediate position 

 between ludificaia and trinervia, the sexual characters of the male 

 apart from the last ventral are also intermediate. As already re- 

 marked, a strict regard for the sexual peculiarities is necessary to 

 enable the species to be correctly separated. 



Four female specimens in my cabinet from Nevada are entirely 

 green beneath. 



Occurs in Colorado and Nevada. 



21. C. oaurina n. sp. — Form nearly as in femorata, piceous, surface dark 

 bronze, the punctured spaces usually cupreous, rarely greenish, body beneath 

 feneous, sometimes slightly greenish along the middle ; antennje more slender to 

 tip, greenish % or cupreous 9 , third joint as long as the next two ; front % 

 rather flat, greenish, densely punctate and with two callosities, or in 9 more 

 convex, more coarsely punctured and cupreous; clypeus (106 > very broadly tri- 

 angularly emarginate at middle, arcuate each side ; thorax nearly twice as wide 

 as long, sides at middle nearly jjarallel or slightly sinuate, at apex and base nar- 

 rowed ; disc feebly convex, median line broadly depressed and densely punctured, 

 limited each side by an irregular but rather broad smoother space, usually two 

 callosities toward the side, the surface otherwise densely and very coarsely punc- 

 tured ; elytra a little wider than the thorax, parallel, narrowed at apical third, 

 the margin serrulate, the apices obtuse ; disc subdepressed, the first costa distinct, 

 sometimes nearly entire, the second and third more or less interrupted, the fourth 

 existing as a finely elevated line, the intervals with densely punctured spaces of 

 irregular shape, and broad smoother spaces with reticulating lines near the sides, 

 basal fovea moderate ; body beneath sparsely punctate ; prosternum truncate in 

 front; anterior femur with rather obtuse tooth, very feebly serrulate; last ven- 

 tral segment with margin serrate. Length .34 -.44 inch; 8.5-11 mm. (Fig. 10.5.) 



Male. — Prosternum densely punctured, sparsely pubescent; anterior tibia (109) 

 arcuate, the inner edge with a rather deep notch one-third from the apex, and 

 an obtuse dilatation narrowing again at the tip ; middle til)ia arcuate, rather ab- 

 ruptly dilated at apex, posterior tibia straight; last ventral (107) with deep, 

 semi-circular emargination and vaguely depressed along the middle ; last dorsal 

 sparsely punctate, triangularly emarginate at tip. 



Female.- — Prosternum coarsely .sparsely punctate ; anterior tibia feebly arcuate, 

 not dilated at tip, middle and posterior straight; last ventral (108) with a feeble 

 emargination limited in front by a distinctly elevated transverse carina; last 

 dorsal coarsely punctate, with a very feeble notch at middle. 



This is one of the species separated from the series formerly 

 thought to be varieties of trinervia. On comparison the present 

 species differs from trinervia and carinipennis in having the cost?e 

 much less distinct and more interrupted, and the densely punctured 

 spaces less numerous and the smooth spaces consequently much larger. 

 The true differences must, however, be looked for in the sexual char- 

 acters as figured. 



Occurs in Colorado, Nevada and Oregon. 



