20 H. C. FALL. 



Upper tooth of front tibia about two-thirds as far from the 

 apical tooth as from the base, tarsi not (?) hairy in the 

 male; punctuation of upper surface moderate. 



77. curvaticeps. 

 Front sparsely, clypeus more closely but not densely punctate. 



78. bidentata. 



Antennae 9- jointed, head usually with an elongate impression above 



each eye; prothorax widest at base, the sides subsinuate 



before the basal angles, which are a little acute as viewed 



from above 79. abuormis. 



37. Basal marginal line of thorax not or scarcely narrowed at middle; 



transverse raised line of mentum at about the anterior 



third 80. harperi. 



Basal marginal line of thorax distinctly narrowed or subinterrupted 

 at middle; raised line of mentum at or about the middle of 

 its length 81. texana. 



38. Pale rufotestaceous, clypeal margin arcuate from side to side 



(Florida) 82. lailguida. 



Ferruginous or brown, clypeal margin truncate at middle, size 

 still smaller (Arizona) S3, pumila. 



39. Tarsal joints clothed beneath toward their apices with dense 



fulvous hair; terminal joint of maxillary palpus dilated in 

 the male; clypeal angles prominent, subdentiform, the 

 external sinuation either feeble or distinct; sides of pro- 

 thorax broadly subangulate at middle, convergent and 

 nearly straight in front, parallel and nearly straight poste- 

 riorly 84. tarsalis. 



Tarsal joints not conspicuously hairy beneath; maxillary palpi not 

 differing in the sexes (so far as known) 40. 



40. Elytral punctuation confused on all the intercostal spaces (except 



in some examples of confusa) ; mental declivity usually dis- 

 tinctly margined behind, size somewhat larger, color 



rufotestaceous to piceous 41. 



Elytral punctuation confused only on the subsutural interspace, 

 elsewhere arranged in nearly regular series; mental de- 

 clivity feebly defined, not margined behind; propygidium 

 without apical groove; size smaller, color rufotestaceous. 43. 



41. Elytra without minute alutaceous sculpture, the surface like that 



of the prothorax polished and strongly shining.. 85. polita. 

 Elytra with fine or minute alutaceous sculpture '....42. 



42. Clypeus very broadly reflexed, the angles not prominent but with 



a well marked external sinuation; front tibias very broad 

 and stout, the upper tooth strongly post-median in position; 

 prothorax widest at or even slightly in advance of the 

 middle 86. errans. 



