DYNASTIN/E 127 



surface rather uneven, minutely, remotely punctate ; sides ( 9 ) feebly, 

 longitudinally impressed beneath the humeral callus, the edge from 

 basal sixth to the middle very narrowly and gradually explanate, 

 not laterally prominent; pygidium strongly transverse, ochreous, 

 almost impunctate and glabrous, except near the base and trans- 

 versely near the apex, where the punctures become distinct, each 

 bearing a moderate hair; surface rather more convex in the male; 

 abdomen with confused punctures, bearing rather fine hairs through- 

 out, decidedly close-set basally and broadly toward the sides but 

 everywhere less coarse than in perspicua; hind tarsi shorter in both 

 sexes, but little longer than the tibiae; claw-joint of the anterior male 

 tarsi shorter than in perspicua and much shorter than the first four 

 joints combined. Length (cf 9 ) 17.5-20.5 mm.; width 9.5-11.0 mm. 

 Arizona (Oak Creek Canon and Huachuca Mts., also "southern 

 Arizona " Snow). Five examples. [ Cyclocephala manca Lee.] 



manca Lee. 



Form narrower and more ovoidal, rather convex, shining, similar in 

 coloration, except that the elytra have the piceous-black shading 

 off very gradually and broadly toward the suture into a piceo-rufous 

 tint; head relatively a little larger, slightly more than half as wide 

 as the prothorax, the rather sparse punctures becoming much closer 

 in the broadly concave contour of the clypeus, the latter however 

 being lost at the base of the clypeus, which is three-fifths wider than 

 long, the sides straight and feebly converging from the base to rather 

 beyond the middle, there rounded, thence nearly straight and strongly 

 converging to the broadly parabolic and reflexed apex; suture effaced 

 medially but traceable as a feeble sinuous convexity of the surface; 

 antennal club a little longer than the six preceding joints; prothorax 

 throughout nearly as in perspicua but with the base more definitely 

 lobed medially, the lobe truncate; scutellum smaller than usual, 

 smooth, pallid; elytra nearly a fourth longer than wide, more than a 

 third wider than the prothorax, the sides rather more arcuate, the 

 apex more rounded in posterior two-fifths; surface with minute 

 sparse punctures, some of which form irregular lines; flanks scarcely 

 . at all modified in the female, the edge narrowly and gradually 

 explanate from basal fourth to a little behind the middle; abdomen 

 with the punctures disposed as in manca (9), sparser than in the 

 male; hind tarsi more slender, not longer than the tibiae. Length 

 (9) 17.5 mm.; width 9.5 mm. New Mexico, F. H. Snow. One 

 specimen zuniella n. sp. 



In this genus the post-coxal process of the prosternum is short, 

 with the tip flattened and posteriorly arcuate to external view, 

 with a rounded and more pallid knob sunken slightly into the ante- 

 rior part of the flattened tip. There is some variation in the acute- 

 ness and sharpness of the apical thoracic angles in manca. There 

 is also considerable variety in the form of the clypeus throughout 

 the genus; while generally having a pointed tendency, it sometimes 



