898 WILLIAM G. DIETZ, M.D. 



rather short, fourth not longer than the two preceding joints together. Length 

 3.0 3.75 mm. ; 0.12-0.15 inch. 



% . Ventral segments 2-5 broadly impressed and clothed with long, grayish 

 or fulvous pubescence, middle and posterior tibiae unguiculate at the apex. 



Hab.- — Ea.'^terii, Middle and Western States. 



A careful comparison with Say's descrijjtion, supplemented by 

 those of Gcrmar* and Bohemann,t leaves no doubt in my mind that 

 this is Say's species. It varies considerably in size, Say's statement 

 — "length more than one-tenth inch" — is too indefinite. The size 

 as given by Germar — "magnitudive dellodk (/utti(la'" agrees, al- 

 though the foot-note, " mihi invisa" makes it difficult to discover the 

 source of his information unless based on Say's original description. 

 C sabulirostris Sch. applies to the female ; it does not differ otherwise. 



This species may readily be distinguished from all the preceding 

 species by the posterior tibise being sinjply subangidate and rather 

 slender ; from all the following by the much stouter tarsi and on the 

 whole larger size. The impressed abdomen of the male with its long- 

 pubescence occurs in other species. 



A form occurring in Utah and Colorado differs considerably from 

 the typical. 



Var. tenebrosm. — Dorsal channel of the ])rothorax reduced to a 

 well defined and deeply impressed basal fovea, prothorax more 

 strongly convex and very densely and finely punctured, the scaly 

 vestiture is much finer and more sparse, scarcely at all mottled, giv- 

 ing the whole insect a much darker appearance. This may possibly 

 be C. /e/;ro,s«,s Boh., the descriptive phrase " thorace non canalicu- 

 lata" being a])plicable to the variety under consideration, but the 

 im])ression at the base of the prothorax is superficial. I have not 

 been able to identify this species with any specimen before me. A 

 specimen in the National Museum collection bcai's tlie cal)inct label, 

 " C. lepro.nis,'' but the prothorax is distinctly canaliculate, the scaly 

 vestiture a dirty ochreous. Why Bohemann should refer this spe- 

 cies to Say as its author is difficult to understand, as I have been 

 unable to discover any species described under that name in Say's 

 writings. 



A. tarsaliM n. sp. I'l. xii, fig. 11. — Broadly oval, black, antennse and legs 

 rufopiceous. clothed with grayish white scales, larger and very dense on the un- 

 derside, smaller and less crowded above. Beak rather slender, subcarinate, 

 densely punctured and scaly in its basal half, tapering, more finely punctuied 



"■■•■ Schoenb., gen. et spetfl Curcul. vol. iv, 1, p. 289. 

 t Ibid. vol. viii, 1, p. 394. 



