66 PROCEEDINGS OF THE Js^ATIONAL MUSEUM vol. 89 



without traces of lateral oblique carinae (genitalia fig. 



6, a-d) disparilis (Horn) 



Elytra alwaj^s pruinose, usually markedly and densely so, 

 usually finely punctate and hardly rugose; sixth ab- 

 dominal segment with a much deeper impressed sulcus 

 each side of which is a faint, lateral, oblique impression 22 



22 (21). Genitalia in en face view with upper margin deeply emar- 



ginate each side between center top and point of great- 

 est width (fig. 7, a-d) ; in lateral view apical margin is 

 slightly reflexed at middle; lower apex of genital stem 

 without bristles or with very small fine ones__huachuca, new species 

 Genitalia in en face view gently curved each side of middle 

 top to point of greatest width at each side (fig. 7, g-i); 

 in lateral view apical margin is very strongly reflexed 

 at middle; lower apex of genital stem with several to 

 many long and rather coarse bristles chapini, new sjiecies 



23 (3). Tarsal claw definitely serrate (not pectinate) along two 



margins 24 



Tarsal claw serrate along only one margin (or hardly 



noticeably so at all) 25 



24 (23). Front claws each with a strong tooth just before apex; 



thorax and base of elytra with ver}' long, fine, erect 



hairs (genitalia fig. 10, k, I, n) macmurryi, new species 



Front claws with subapical enlarged tooth absent, or 

 rarely present and then on outer claw only; head and 

 thorax subglabrous (genitalia fig. 10, i-j) wickhami, new species 



25 (23). Above densely pruinose, thorax apparently impunctate, or 



at least punctures hardl}- visible from above; glabrous 



except for elytra 26 



Pruinose or shining above, thorax usually punctate and 



shining (if pruinose then with long hair) 28 



26 (25). Elytra with long and dense hairs; clypeus and front with 



erect hair on entire disk; first segment of hind tarsus 

 strongly expanded (fig. 4, d) (genitalia fig. 9, g-j) tarsalis (Schaeffer) 

 Elytra with minute, hardly visible hairs; clypeus glabrous; 

 first segment of hind tarsus usually but little expanded, 

 at most becoming gradually wider apically (note: a 

 variable character; always check genitalia) 27 



27 (26). First segment of hind tarsus strongly expanded just before 



the apex (fig. 4, /) ; thorax pruinose or not, puncturation 

 always quite obvious; clypeus usually densely pilose 



(genitalia fig. 9, a-c) falsa LeConte (pai't) 



First segment of hind tarsus normal, not at all expanded 

 toward apex; entire upper surface densely pruinose, the 

 punctures of thorax hardly perceptible; clypeus nude or 

 nearly so falsa nogales, new subspecies 



28 (25) . First segment of hind tarsus strongly expanded near apex, 



about twice as long as wide at apex; first segment of 



front tarsus with noticeable to large inner tooth 29 



First segment normal, apparently a little expanded but al- 

 ways about three to four times longer than width at apex; 

 first segment of front tarsus without or with a very small 

 inner spine 32 



