104 GEO. H. HORN, M. D. 



Elytra with three golden fovese, on the disc ; the second costa interrupted 

 by the anterior fovea and not joining the fourth near the apex. 



36. geiiiinata. 



Elytra with two indistinct fovefe ; the second costa continuous through the 

 anterior fovea and at apex joining the fourth costa 37. Jlerkelii. 



Elytra with two discal cupreous fovese ; second costa interrupted by the 

 anterior fovea and not joining the fourth at apex; disc of thorax with 



vague median depression 38. aciitipeiiiiis. 



Thorax with a well marked median sulcus ; elytral costs© interru]ited ; last ven- 

 tral segment with slightly interrupted margin 39. libonoti. 



The s])ecies of this group, which are all from the extreme south- 

 western regions of our country, recall in a striking manner the spe- 

 cies of the first group by their size, outline and many points in their 

 sexual characters. 



35. C. serea Chev. — Form rather elongate, piceous, with feeble bronze sur- 

 face lustre, beneath more brassy and shining, sometimes slightly cupreous; an- 

 tennse bronzed % or piceous 9 , gradually more slender to the tip, the third 

 joint a little longer than the next three ; front nearly flat, seneous, densely punc- 

 tured and finely pubescent % , more coarsely and irregularly punctured and with 

 irregular smooth spaces 9 ! clypeus (174) deeply triangularly emarginate at mid- 

 dle, arcuate each side ; thorax nearly twice as wide as long, obliquely naiTowed 

 in front, the sides straight, nearly parallel or slightly convergent to base, the hind 

 angles distinct ; disc moderately convex, slightly depressed at middle, sometimes 

 a vague depression at base opposite the middle of each elytron, and with irregular 

 callo.sities near the sides in front ; surface finely sparsely punctured at middle 

 third, with a smooth median line, near the sides more coarsely and densely punc- 

 tured ; elytra a little wider than the thorax, gradually narrowed almost from 

 the humeri, the margin feebly serrulate near the apex, the tips acute ; disc mod- 

 erately convex, the basal and humeral fovese rather deep, three discal costse, the 

 first usually well defined from apex to middle, the others finer, more or less in- 

 terrupted, connected by intervening smooth spaces, one moderately large, densely 

 punctured discal fovea ou the second carina one-third from base, usually sur- 

 rounded by a smooth elevated border, intervals between the carinae rather finely, 

 not very densely punctured, the punctuation finer and sparser in the scutellar 

 region ; body beneath nearly smooth along the median line, except ou the abdo- 

 men, whfere the punctures are coarse and sparse, sides of body more densely and 

 finely punctured and slightly pubescent ; ventral segments with feeble callosities 

 and with the hind angles slightly prominent ; last ventral segment with the mar- 

 gin not serrate, but with an interruption at the posterior third ; prosternum 

 slightly arcuate in front, but not truly lobed ; anterior femur with a moderately 

 large tooth not serrate. Length .68 - .86 inch ; 17 - 22 mm. ( Fig. 173. ) 



ilfaie.— Prosternum with very few fine punctures at middle, a line of piliferous 

 hairs along the sides and very coarse punctures at the sides in front ; anterior 

 tibia (177) feebly arcuate, slightly dilated at tip, a slight tooth at the beginning 

 of the dilatation, above which is a distinct notch ; middle tibia slightly arcuate, 

 the posterior straight; last ventral (175) with a short, flat carina at middle in 

 front, the apex vei-y deeply emarginate, the angles prominent and sinuately 

 truncate ; last dorsal segment coarsely punctured and entire. 



