NORTH AMERICAN BUPEESTID BEETLES 15 



99. Posterior margin of hind coxae regularly, arcuately emarginate ; pubes- 



cent vittae on elytra obsolete (82) aeneocephalus Fisher. 



Posterior margin of hind coxae strongly siuuate; pubescent vittae on 

 elytra moderately distinct 100. 



100. Pronotum strongly depressed at the sides, with the depressions rather 



densely clothed with long pubescence (85) illectus Fall. 



Pronotum feebly depressed at the sides, and without distinct long pubes- 

 cence (86) sierrae Van Dyke. 



101. Pronotum clothed with distinct long pubeseence toward the sides ; pubes- 



cent vittae on elytra distinct (87) felix Horn. 



Pronotum not clothed with distinct long pubescence toward the sides ; 

 pubescent vittae on elytra obsolete (88) jacobinus Horn. 



102. Front of bead distinctly depressed, and more or less concave 103. 



Front of head convex, or at most, only feebly, longitudinally de- 

 pressed i 106. 



103. Sides of prosternal process parallel to behind the coxal cavities. 



(89) floridanus Crotch. 

 Sides of prosternal process expanded behind the coxal cavities 104. 



104. Pubescent spots on elytra distinct, and the basal and median ones sepa- 



rated ; large species (6.5-7.5 millimeters) (90) impexits Horn. 



Pubescent spots on elytra not distinct, often obsolete ; small species (4-6 

 millimeters) 105. 



105. Pronotum with a distinct median depression ; basal and median pubescent 



spots on elytra not connected ; head glabrous in both sexes. 



(91) cupreonitens Fisher. 

 Pronotum without a distinct median depression ; basal and median pubes- 

 cent spots on elytra usually connected, forming a more or less distinct 

 vitta on basal half; head pubescent in both sexes (92) addendus Crotch. 



106. Pronotum with the marginal and submarginal carinae separated for their 



entire length 107. 



Pronotum with the marginal and submarginal carinae not separated tor 

 their entire length 109 



107. Pronotum rather deeply, broadly depressed at middle ; pubescence on 



elytra usually forming irregular designs similar to lecontei. 



(93) quercus Schaeffer. 

 Pronotum not, or at most, only feebly depressed at the middle 108. 



108. Pronotum finely, distantly, and very obliquely rugose on disk. Male with 



the front of head bronzy cupreous, and densely clothed with white pubes- 

 cence ; first ventral segment of abdomen broadly grooved at middle, and 

 slightly pubescent. Female with front of head dark reddish brown. 



(94) palmacollis Horn. 

 Pronotum rather coarsely transversely rugose on disk. Male with the front 



of head bright green, and not densely pubescent ; first ventral segment of 

 abdomen flattened or vaguely grooved, and not pubescent. Female with 

 the front of head bright reddish mahogany (95) prosopidis Fisher. 



109. Sides of prosternal process expanded behind the coxal cavities ; prosternal 



lobe broadly rounded or feebly stfbtruneate in front 110. 



Sides of prosternal process parallel to behind the coxal cavities ; pros- 

 ternal lobe more or less emarginate in front 112. 



110. Pubescent spots on elytra distinct, the median one elongate, and placed in 



a distinct depression 111. 



Pubescent spots on elytra indistinct, and the median one usually not in a 

 depression (96) exiguellus Fisher. 



