AMERICAN COLEOPTERA. 19 



32. Upper tooth of front tibia distinctly ante-median in position; hind 



tarsi scarcely or but very slightly longer than the tibife. 

 Lateral margin of clypeus with a distinct angulation just before 

 the eye, which is at least as prominent as the visible por- 

 tion of the eye; coarser punctuation at sides of meta- 

 sternum extending posteriorly barely half way to the me 



dian line; color black 69. maura. 



Lateral margin of clypeus with at most a very feeble prominence 

 close to the eye, which is less prominent than the eye 

 itself; dense lateral punctuation of the metasternum ex- 

 tending fully three-quarters the distance from the side 

 margin to the median line; color brown. 

 Lateral margin of clypeus with a minute angulation near the 



eye; form more robust 70. pinguescens. 



Lateral margin of clypeus devoid of ante-ocular prominence; 

 form less robust. 

 Basal margin of thorax at most feebly impressed laterally; 

 punctuation denser; upper tooth of front tibia; strongly 



ante-median 71. fronclicola. 



Basal margin of thorax quite strongly impressed; the im- 

 pression narrowed or subinterrup ted at middle; punctua- 

 tion less dense; upper tooth of front tibiae only slightly 



ante-median 72. hnsulis. 



Upper tooth of front tibia median; hind tarsi in the male much 

 longer than the tibia; and more hairy beneath 33. 



33. Mental ridge feeble or obsolete; prothorax more than one-half 



wider than long; punctuation rather coarse and sparse, 

 color blackish, usually with trace of aeneous surface lustre. 



73. leisgii. 



Mental ridge well developed; prothorax less than one-half wider 



than long; punctuation fine and dense; color ferruginous. 



74. thoracica. 



34. Transverse arcuate ridge of mentum well defined 35. 



Transverse arcuate ridge of mentum ill defined — small species.. 38. 



35. Base of prothorax without marginal impressed line 36. 



Base of prothorax distinctly impressed along the margin 37. 



36. Antennae 10-jointed, head not impressed over the eyes; hind 



angles of thorax obtuse. 

 Front and clypeus closely or densely punctate. 



Prothorax distinctly wider at middle than at base; sides rather 



strongly rounded 75. arcuata. 



Prothorax not narrowed behind the middle, widest at or near 

 the base. 

 Upper tooth of front tibia about midway between the apical 

 tooth and the base; tarsi more hairy in the male; punct- 

 uation of upper surface dense 76. (lubia. 



TRANS. AM. ENT. SOC, XXXV. JANUARY, 1909. 



