286 MEMOIRS ON THE COLEOPTERA 



very irregular series to behind the middle, very sparse on the flanks; 

 abdomen closely clothed with very small, decumbent but obvious 

 brownish hairs, the sinuato-truncate apex of the fifth segment (d 71 ) 

 more than one-half as wide as the base; minute punctulation of the 

 femora extremely fine and not conspicuous and bearing extremely 

 minute hairs. Length (cf 9 ) 24.0-27.8 mm.; width 8.9-11.4 mm. 



Arizona (probably southern) spinicollis Csy. 



Prothorax much larger, transverse, very nearly as wide as the elytra in 

 the male; surface shining; antennae stout, gradually and evenly 

 tapering, the fifth joint not abruptly much narrower than the fourth, 

 the dense hairs dark brown ; prothorax punctured as in the preceding; 

 elytra oblong, the sides parallel and barely arcuate, narrowing behind 

 to the broadly obtuse apex, very convex, the line of flexure abrupt, 

 rather acutely marked and coarsely punctate; punctures sparse, 

 coarse, becoming more uniform basally, extending sublinearly to 

 the middle, very coarse, numerous and graniferous basally on the 

 flanks; punctures even coarser and more numerous throughout the 

 thoracic flanks than in spinicollis; abdominal vestiture excessively 

 minute, fine and scarcely discoverable, the sinuato-truncate apex 

 of the fifth segment (cf) fully one-half as wide as the base; femora 

 without discoverable hairs though minutely, strongly punctulate. 

 Length (cf) 25.0 mm.; width 9.7 mm. Southern Arizona. 



pollens n. sp. 



7 Form rather stout, very shining, the legs faintly picescent; antennae 

 slender, two-thirds as long as the body, densely clothed with red- 

 brown pubescence, without evident annulation of any kind in the 

 type; prothorax slightly transverse, much narrower than the elytra, 

 swollen at the sides near the apex, the spine small but acute and 

 distinct; surface very minutely, not densely punctulate, with evenly 

 distributed minute punctures everywhere intermingled, near the 

 apex and toward base with rather coarse deep sparse and perforate 

 punctures; elytra oval, rather more tapering behind to the obtuse 

 apex, three-fourths longer than wide, moderately convex, with 

 short interrupted flexuous and feebly impressed broad lines, and a 

 few coarse punctures, not extending to the middle suturally, but 

 more numerous and extending to apical fourth laterally, the line of 

 flexure obtuse, the flanks with very coarse punctures and gradually 

 coarser simple deep fovea? basally; broad even sinus of the fifth 

 ventral (cf) half as wide as the base; femora very minutely, not 

 densely punctulate, with very fine punctules everywhere inter- 

 mingled. Length (cf ) 21.0 mm.; width 8.0 mm. New Mexico. 



simplicicornis n. sp. 



A Somewhat similar to the above but less lustrous, with more elongate- 

 oval, much more convex elytra, nearly twice as long as wide, on 

 which the line of flexure at the sides is almost completely obsolete, 

 the surface with very fine and faint sinuous lines, impunctate except 

 a few moderate and sparse punctures near the sides, those of the 

 flanks scarcely half as large as in the preceding and very sparse; 

 prothorax and antennae similar, except that the former is much 



