NORTH AMERICAN BUPRESTID BEETLES 13 



70. Elytra with pubescent spaces or designs 71. 



Elytra without pubescent spaces 75. 



71. Pronotum with distinct prehumeral carinae 72. 



Pronotum without distinct prehumeral carinae :- 74. 



72. Prosternal lobe deeply emarginate in front 73. 



Prosternal lobe not emarginate in front (64) fallax Say. 



73. Above bicolored ; pronotum aeneous or cupreous, and the elytra piceous, with 



a more or less distinct purplish tinge (65) scitulus Horn. 



Above unicolored, bronzy black to olivaceous brown, and sometimes with a 

 feeble purplish tinge (66) obsoletoguttatus Gory. 



74. Pronotum and elytra bronzy brown, shining, the former more or less cu- 



preous, the latter sometimes violaceous posteriorly, with the anterior 

 pubescent design entire, and longitudinally arcuate. 



(67) lautuellus Fisher. 



Pronotum and elytra piceous, the former subopaque, the latter shining, 



with a more or less bluish or violaceous tinge, and the anterior pubescent 



design strongly interrupted (68) omatulus Horn. 



75. Pronotum with the sides and median part densely pubescent. 



(69) dozieri Fisher. 

 Pronotum with tbe sides and median part not conspicuously pubescent 76. 



76. Anterior tarsal claws with the inner teeth feebly turned inward, but their 



tips broadly separated 77. 



Anterior tarsal claws with the inner teeth not turned inward 79. 



77. Body above distinctly, sparsely, uniformly pubescent; elytra with distinct 



costae : (13) townsendi Fall. 



Body above not distinctly pubescent ; elytra without distinct costae 78. 



78. Male with the claws on anterior tarsi feebly cleft, the inner tooth dis- 



tinctly broader than outer one, and broad toward apex. Host plants : 



Madrone and manzanita (14) arbuti Fisher. 



Male with the claws on anterior tarsi deeply cleft, the inner tooth not dis- 

 tinctly broader than outer one, and acute at apex. Host plant: Oak. 



(15) angelicus Horn. 



79. Antennae with the outer joints (seven to eleven) distinctly wider than long. 



80. 



Antennae with the outer joints (seven to eleven) not distinctly wider 



than long 81. 



80. Prosternal lobe broadly rounded in front. Host plant : Galls on rose. 



(70) viridis var. fagi (Ratzeburg). 

 Prosternal lobe subtruncate, or more or less emarginate in front. Host 

 plants : Willow, maple, hazel, and alder. 



(71) politus (Say) and subspecies. 



SI. Prosternal lobe deeply emarginate in front 82. 



Prosternal lobe broadly, but not deeply emarginate in front 83. 



82. Above uniformly reddish cupreous, with a violaceous tinge ; form elongate 



and rather sti'ongly attenuate posteriorly ; prosternal lobe with a semi- 

 circular emargination in front ; prehumeral carinae sharply defined. Host 



plant: Pear (72) sinuatus (Olivier). 



Above uniformly greenish blue ; form short and not strongly attenuate 

 posteriorly ; prosternal lobe broadly, deeply emarginate in front ; pre- 

 humeral carinae not sharply defined (73) coeruleus (Rossi). 



83. Large species (6-8 millimeters) ; inner tooth of tarsal claws long and 



acute ; male genitalia with the sides arcuately expanded. Host plant : 

 Crataegus (74) crataegi Frost. 



