H. C. FAI.L. 133 



Tibial mucro long, simple; intervals much wider than the striie. 



Less elongate ; heak feebly attenuate ; tiitial niucro in-ojecting at an angle 



vfitli the tibia 5:!. iiorelliiin. 



More elongate; beak distinctly attenuate ; tibial niucro projecting in line 



with the tibia 54. iiebraxkeiiixe. 



7. Punctuation beneath not conspicuously coarse. 8. 



Metasternnm and abdomen very coarsely, dee|)ly punctured.. .55. minor. 

 H. Pubescence sparse. 



Elytral intervals flatter; hairs beneath less scale-like; surface usually with 

 ieneous lustre; strial punctures finer; su])erior marsrin of antennal 



fovea not angulate 56. tiirbii lentil in. 



Elytral intervals noticeably convex; vestiture beneath decidedly squanii- 

 forni ; surface without geneous lustre; strial punctures coarser; supe- 

 rior margin of antennal fovea angulate 57. iniportlinnni. 



Pubescence conspicuous. 

 Tibial mucro long, acute; heak ( 9 ) slender, finely sculptured. 



Intervals flat ; surface frequently aeneous 58. griseiini. 



Intervals moderately convex ; surface never jeneous.. . • .59. s^qiiabile. 

 Tibial mucro shorter, subangulate beneath near the tip ; beak stronger, more 



coarsely sculptured 60. 4l<»IO!4iini. 



9. Beak rather long and stout; species small, pubescent. 61. cariniroslrnm. 

 Id. Middle and hind tibise mucronate (%); plainly pubescent. 



62. peninsnisire. 

 Front and middle tibise mucronate ( %) ; scarcely pubescent. 



63. cribricolle. 

 11. Middle and hind tibise mucronate ( % ). 



Elytral intervals strongly convex 64. porcatiiui. 



Elytral intervals flat or nearly so. 

 Anterior tarsi of % not dilated. 



Second joint of antennae reaching the eye ; beak more finely punctate. 

 Tibial nmcro short; abdomen coarsely punctate; intervals narrower, 



less flat. 65. centrale. 



Tibial mucro longer; al>donien less coai'sely punctate; inteivals flat. 



66. roNlriini. 

 Third joint of antenna? reaching the eye; beak longer, coarsely punc- 

 tate 67. t*olora«leiise. 



Anterior tarsi of 1 dilated 68. nigrum. 



All the tibiae mucronate ( % ), the anterior sometimes very minutely so. 



Superior margin of antennal fovea scarcely at all angulate. (PI. IV, fig. "22). 

 Striae deeper; intervals more or less convex ; tibial mucro stronger. 



69. eordatum. 

 Striae shallow : intervals flat. 



Beak rather strongly attenuate, scarcely different in the sexes. 



70. oblifiim. 

 Beak scarcely, or at most feebly attenuate, longer in the 9 • 



71. flirt iviim. 



Superior margin of antennal fovea rather strongly angulate. (PL IV, fig. 21)- 



Mucro of middle and hind tibiae irregular, or appeudiculate beneath ; 



beak less attenuate; size larger, more convex.- . • -72. commodum. 



Tibial mucro simple; heak more attenuate; size smaller, less convex. 



73. confertum. 



TR.\NS. AM. ENT. SOC. XXV. OCTOBER, 189b. 



