NORTH AMERICAN COLEOPTERA. 89 



Female. — The tibiae nearly straight, the anterior not dilated ; last ventral (83) 

 longer than in the male and with a small semi-eircular notch ; last dorsal coarsely 

 punctate, feebly emargiuate. 



This species is one of a small group in which the markings are 

 very similar, and consequently difficult to distinguish, except by other 

 characters, principally sexual. The present species is notable in 

 having the joints of the antenme from the fourth to the tenth of 

 equal width, the usual form is more slender externally. The male 

 is ])eculiar in not having the prosternum very differently sculptured 

 from the female, the usual punctuation is denser and finer. 



Occurs not uncommonly in Colorado. I have seen others in the 

 cabinet of Mr. Ulke from New Mexico, Arizona and California. 



18. C scabripeiinis Lap. et Gory. — Form offemorata, a little more acute 

 posteriorly, color brassy or slightly cupreous ; antennse more slender externally, 

 greenish blue % or subcupreous 9- third joint as long as the next two; front 

 rather flat, densely punctate and green % , or slightly convex, more coarsely 

 punctate and more or less cupreous 9 - callosities in both sexes ; clypevis (86) very 

 broadly not deeply triangularly emarginate at middle, on each side rounded ; 

 thorax twice as wide as long, narrowed at apex and base, sides at middle nearly 

 parallel, disc moderately convex, a vague median channel densely punctured, 

 wider in front, limited each side by a slightly elevated smooth space, between 

 which and the sides the surface is irregular, very coarsely and confluently punc- 

 tate, forming transverse plicae ; elytra wider than the thorax, parallel, narrowed 

 at apical third, the margin serrulate the apices separately obtuse ; disc slightly 

 convex, the four costae distinct, but more or less interrupted and with anasto- 

 mozing lines, the surface densely, moderately, finely punctured, the basal fovea 

 rather feeble ; body beneath coarsely not densely punctate, the metasternum more 

 densely and finely ; prosternum not lobed in front ; anterior femur with a mod- 

 erately strong tooth crenulate on its distal margin ; last ventral segment with 

 serrulate margin. Length .34 -.42 inch ; 8.5 -10.5 mm. (Fig. 85.) 



Male.— Prostevnum. moderately, densely and rather coarsely punctate, sparsely 

 pubescent ; anterior tibia (89) arcuate, moderately dilated at apical fourth ; middle 

 tibia arcuate, slightly broader near the apex, the posterior arcuate ; last ventral 

 segment (87) semi-circularly emarginate; last dorsal coarsely punctate feebly 

 emarginate at apex. 



Female. -Prosternum coarsely and much more sparsely than in the male; an- 

 terior and middle tibife feebly arcuate, the posterior straight; last ventral (88) 

 with a very small semi-circular emargination ; last dorsal coarsely and densely 

 punctate, the apex emarginate. 



The color of the under surftice may vary from aeneo-cupreous to 

 greenish. I have seen a specimen from the Museum of Comj)arative 

 Zoology (juite green above. From all the other species of the group 

 which follow (with truncate i)rostei-num) this nmst be distinguished 



TEANS. AMEK. ENT. SOC. (12) MARCH, 1886. 



