24 MISC. PUBLICATION 4 7 0, U. B. DE.PT. OF AGRICULTURE 



60. Clypeus acutel\ r notched at middle and semicircularly rounded on 



each side; lateral lobes of male genitalia unequal in length, with 



the lateral spine on each side oblique 61 



Clypeus acutely notched at middle but not semicircularly rounded 

 on each side; lateral lobes of male genitalia equal in length, with 

 the lateral spine on each side transverse 



(52) adelpha Gemminger and Harold, p. 130. 



61. Antenna gradually narrowed to apex, the last segment not distinctly 



transverse and narrower than the tenth segment; male genitalia 

 with tip of median lobe wider than tip of lateral lobe; median 

 carina on eighth abdominal tergite of female not extending 



beyond apical notch 2 



Antenna not narrowed to apex, the last segment transverse or quad- 

 rate, and as wide as the tenth segment; male genitalia with tip 

 of median lobe not wider than tip of lateral lobe; median carina 

 on eighth abdominal tergite of female strongly elevated and ex- 

 tending beyond apical notch- (53) rugosiceps Melsheimer, p. 131. 



62. Antennal segments of male distinctly pale yellow toward outer 



margins, and the sides of the genitalia arcuately rounded and 

 not constricted near apices; eighth abdominal tergite of female 

 shallowly depressed on each side of median carina 



(54) viridiceps Melsheimer, p. 132. 

 Antenna of male bronzy green, usually becoming reddish cupreous 

 toward apex, but the segments not distinctly pale yellow toward 

 outer margins, and the sides of the genitalia constricted near 

 apices; eighth abdominal tergite of female usually deeply de- 

 pressed on each side of median lobe _ (55) femorata (Olivier), p. 133. 



63. Clypeus narrowly, triangularly emarginate in front, or acutely in- 



cised at the middle 64 



Clypeus broadly, triangularly or arcuately emarginate in front 67 



64. Clypeus acutely incised at middle, with a tooth on each side of the 



incision 65 



Clypeus narrowly, triangularly emarginate in front, without a tooth on 

 each side of the emargination_ (56) lilaceous Chamberlin, p. 136. 



(57) juniperinus Chamberlin, p. 137. 



65. Tooth on anterior tibia of male one-fourth from apex; last visible 



abdominal sternite of female deeply, broadly, arcuately emar- 

 ginate at apex (58) burkei Chamberlin, p. 139. 



Tooth on anterior tibia of male one-third from apex; last visible 

 abdominal sternite of female shallowly, arcuately emarginate at 

 apex 66 



66. Species from West Coast (California, Oregon, Washington, Idaho, 



and Nevada) (28) semisculpta LeConte, p. 83. 



Species from Southwest (Arizona, New Mexico, Colorado, and 

 Utah) (29) cuprascens LeConte, p. 86. 



67. Body above green (sometimes with a bronzy tinge) to violaceous blue 



Or purple 68 



Body above black, brown, cupreous, or bronzy brown 71 



68. Elytra green, and each elytron ornamented with a purplish spot at 



apical third (59) subopaca Schaeffer, p. 140. 



Elytra uniformly green, bluish green, or purple, without purple spots 



at apical third 69 



69. Antennal segments distinctly yellowish toward outer margins; pro- 



no turn very uneven; large species, 12.5 to 16 mm. 



(60) verdigripennis Frost, p. 141. 

 Antennal segments not yellowish toward outer margins; pronotum 

 at most with only a vague, median depression; small species, 6.5 

 to 11 mm 70 



70. Anterior tibia of male with an acute tooth near apex, and the geni- 



talia broadly rounded at the sides; last visible abdominal sternite 

 of female slightly, broadly emarginate at apex. Western part 



of the United States (36) viridicyanea Horn, p. 100. 



Anterior tibia of male with a broadly rounded dilation near apex, 

 and the genitalia constricted at the sides; last visible abdominal 

 sternite of female narrowly notched at apex. Eastern part of the 

 United States . (46) harrisi (Hentz), p. 119. 



