DYNASTIISLE 133 



two-thirds wider than long, in outline and sculpture nearly as in the 

 preceding species, the basal bead very feeble and only well denned 

 near the sides; scutellum rather wider than long, ogival, with distinct 

 scattered punctures and a few hairs; elytra short, barely at all 

 longer than wide, very little wider than the prothorax, rapidly and 

 very obtusely rounded at apex, coarsely subrugose, strongly but 

 sparsely, very unevenly punctate, the three costae feebly convex and 

 not sharply defined; lateral edge very broadly, feebly sinuate near 

 basal third in both sexes; pygidium (cf ) rather closely punctate 

 and with moderate erect hairs, or ( 9 ) more shining, sparsely punc- 

 tate and glabrous; hind tarsi (c?) one-half or ( 9 ) one-fifth longer 

 than the tibiae, the tibial spurs slender in the former sex, short and 

 stout in the latter. Length (n cf , 8 9 ) 9.5-14.5 mm.; width 5.6- 

 7.8 mm. Arizona, New Mexico and Western Texas. Abundant. 



pallidissima n. sp. 



Body smaller in size and much narrower, very pale flavate in color through- 

 out and rather shining; head a little larger, about half as wide as 

 the prothorax, pale rufous throughout and somewhat strongly but 

 not closely punctate; eyes notably large, convex and prominent, 

 separated by distinctly less than twice their width; clypeus of the 

 same general form and dense rugulose sculpture, but with the apex 

 broadly and much less strongly reflexed; sinus of the suture nearly 

 half the total width; antennal club shorter than in the female of 

 pallidissima; prothorax two-thirds wider than long, more convex, 

 the sides parallel and strongly, evenly arcuate, converging basally 

 but more strongly apically; punctures strong but sparse throughout; 

 basal bead broadly obliterated medially; scutellum nearly similar, 

 rather sharply ogival; elytra more elongate, about a fifth or sixth 

 longer than wide, more circularly rounded in about apical third, the 

 sculpture and lateral edges nearly similar but with the erect hairs 

 sparser and so short as to be discovered only with difficulty; pygidium 

 glabrous, finely, closely, irregularly sculptured laterally, sparsely 

 punctate medially; sternal vestiture fine, sparse and very incon- 

 spicuous; tarsi similar, very slender. Length (9) 9.2 mm.; width 

 5.1 mm. California (Needles), Wickham inconspicua n. sp. 



Pallidissima is allied to hirta, differing in the shorter clypeus, 

 much smaller medial sinus of the suture in the male, more broadly 

 rounded basal thoracic angles and constant absence in a large series 

 of any definite darker elytral mottling; they both differ from incon- 

 spicua in the smaller eyes and less rounded sides of the prothorax. 

 The larger anterior male tarsal claw of this genus is very un- 

 equally split at apex, the outer ramus being very short and extremely 

 slender, so that it is frequently broken off. It is : singular that the 

 true systematic value of Cyclocephala lurida Bland, has been so 

 long misunderstood; it is not even generically the same as im- 

 maculata. with which it is now united. 



