12 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



56. Male with the first and second abdominal segments each with a deep, 



smooth, median groove (50) horni Kerremans. 



Male with the first abdominal segment broadly, longitudinally concave at 

 middle, and the bottom of the concavity roughly sculptured ; second seg- 

 ment with a deep, smooth groove at middle (51) anxius Gory. 



57. Pronotum with a broad, deep, median depression extending from base to 



near apex 58. 



Pronotum without a deep median depression extending from base to apex, 

 at most with a narrow, or moderately deep, broad depression at mid- 

 dle 61. 



58. Elytra with pubescent markings 59. 



Elytra without pubescent markings 60. 



59. Scutellum transversely carinate; elytral costae feebly indicated and not 



entire; prosternal lobe not emarginate in front (52) cavatus Chevrolat. 



Scutellum not transversely carinate; elytral costae distinct, and extending 

 nearly to apex; prosternal lobe emarginate in front. 



(53) aureus Chevrolat. 



60. Sides of pronotum densely pubescent ; elytra dull olivaceous bronze or black, 



with bronzy green vittae (54) concinnus Horn. 



Sides of pronotum not densely pubescent; elytra uniformly purplish black 

 (male), or reddish cuprous (female) (55) restrictus Waterhouse. 



61. Suture between first and second abdominal segments distinctly indicated 



at the sides 62. 



Suture between first and second abdominal segments entirely obliterated, 

 or at most, only vaguely indicated at the sides 67. 



62. Elytra bicolored, bronzy or reddish cupreous, with a greenish or purplish 



sutural vitta common to both elytra (30) pulchellus Bland. 



Elytra unicolored 63. 



63. Elytra with pubescent spots (56) walsinghami Crotch. 



Elytra without pubescent spots, but sometimes uniformly pubescent 64. 



64. Elytra with distinct pubescence; head not deeply (at most only moderately) 



depressed in front 65. 



Elytra without distinct pubescence ; head deeply depressed in front. 



(57) inhabilis Kerremans. 



65. Form very robust ; pronotum evenly convex and without depressions ; elytra 



without costae ; antennae with the outer joints transverse. 



(58) snowi Fall. 



Form normal ; pronotum with depressions ; elytra with costae ; antennae 



with the outer joints not transverse 66. 



66. Pronotum distinctly wider than long; pygidium vaguely longitudinally 



carinate (59) costipennis Fisher. 



Pronotum not wider than long; pygidium distinctly longitudinally carinate. 



(60) baboquivariae Fisher. 



67. Scutellum not distinctly transversely carinate 68. 



Scutellum transversely carinate 70. 



68. Above bicolored; head and pronotum cupreous, sometimes with a bluish 



green tinge; elytra black or bluish black (61) huachucae Schaeffer. 



Above unicolored 69. 



69. Second and third abdominal segments slightly arcuately prolonged at middle 



over the following segments; elytra with vague subsutural pubescent 



vittae (62) ventralis Horn. 



Second and third abdominal segments not prolonged at middle over the fol- 

 lowing segments; elytra without subsutural pubescent vittae. 



(63) obolinus LeConte. 



