116 GEO. H. HORN, M. D. 



and the strong rather distant j)unetuation of the elytra is ahnost 

 peculiar to the present species. 



Occurs in the Middle States region, New Jersey, Pennsylvania, 

 Ohio and District of Columbia. 



Group VIII. 



Three species are separated below as a group, the essential chai'ac- 

 ters being : — last ventral segment with the margin entire, not serru- 

 late ; elytra with the apices separately rounded, the disc without 

 trace of either costa or fovea. 



The following table will distinguish the species : 



Species of rather large size, robust, apex of abdomen exposed beyond the elytra, 

 punctuation of surface rather coarse, elytra with three interrupted purple- 

 black fascife. 



Sides of thorax regularly arcuate 48. atrifa^ciata. 



Sides of thorax oblique in front, arcuate posteriorly 49. l^lltei. 



■ Species rather small and slender, the punctuation sparse and fine ; elytra cov- 

 ering the abdomen, color bright green, without fascife. 

 Sides of thorax very feebly arcuate 50. prasina. 



The male is known of the first species only, in it the antennte are 

 bipectinate, the terminal joint itself being bifurcate. In the female 

 the lower edge of the antennae is broad, so that in section the anten- 

 nal joints are an equilateral triangle. In the other two species, of 

 Avhich only females are known ; the antennae present the usual flat- 

 tened form, and it is probable that those of the male do not differ in 

 structure from the normal type. 



The three species are western, atrifamcda occurring in New Mexico 

 and Arizona, JJlkel in Texas and prasina in the north of California. 



48. C. atrifasciata Lee. — Form robust, slightly depressed, cylindrical, 

 bright green or blue, varying to golden or cupreous ; elytra with three inter- 

 rupted fasciae of black or purple color ; antennae variable in form in the two 

 sexes, dark bronze, third joint very nearly as long as the next three ; front con- 

 vex, not differing in color in the two sexes, coarsely and deeply punctured and 

 with an arcuate, transverse, elevated line above, beneath which is a zigzag line 

 in form of W ; clypeus (239) very broadly not deeply emarginate ; thorax more 

 than twice as wide as long, slightly broader at base than apex, the sides regularly 

 arcuate ; disc convex, a smoother median line posteriorly ; punctures near the 

 middle very coarse and deep, at the sides more dense ; elytra scarcely wider thaik 

 the thorax, parallel, narrowed at apical third, the apices separately rounded and 

 not covei'ing entirely the abdomen, the margins feebly serrulate ; disc convex, 

 without trace of costre, basal fovea moderately deep ; surface less coarsely punc- 

 tured than the thorax and not densely, those nearer the base rather coarser; 

 body beneath coarsely, not densely punctured, the ventral segments without 



