254 MEMOIRS ON THE COLEOPTERA 



17.5-20.0 mm. Upper Arkansas River, Say; near Long's Peak, 

 LeConte. [Prionus emarginatus Say, Journ. Acad. Phila., Ill, p. 

 327] emarginata Say 



3 Prothorax very short, nearly three times as wide as long; body very 

 stout, rufo-piceous, shining, the eyes in size nearly as in integra; 

 prothorax moderately punctate, with all the angles well rounded, 

 the sides rounded, slightly undulated; elytra almost one-half wider 

 than the prothorax, " brevioribus " of the description evidently 

 a misprint for latioribus, about one-half longer than wide, rather 

 strongly punctured, the apices individually rounded; antennae 

 13-jointed. Length (9) 22.5 mm. New Mexico, Ulke. [Pri- 

 onus innocuus Lee., Proc. Acad. Phila., 1862, p. 43].. .innocua Lee. 



Prothorax scarcely more than twice as wide as long; body not relatively 

 stout 4 



4 Body pale yellowish-brown in color throughout, the legs and antennae 

 concolorous; surface strongly shining; head very small, much nar- 

 rowed behind the eyes, the tempora converging and arcuate to the 

 base; eyes moderate, notably convex, separated by about a fourth 

 or fifth more than their width; antennae (c?) moderately stout, 

 strongly imbricate, the lower lobes of the joints deeply emarginate, 

 extending to about the middle of the elytra, 13-jointed, the last 

 joint elongate-oval, much longer than the preceding, with a pointed 

 tubercle on the inner face, as though the joint had originated by 

 an amalgamation of two joints; maxillary palpi slender, very pale, 

 the last joint nearly one-half longer than the preceding; prothorax 

 small, rounded medially at base, truncate at apex, very broadly 

 and evenly rounded at the sides, without trace of inequality, widest 

 but little before the middle, narrowed anteriorly, with the angles 

 very obtuse and rounded, the basal angles broadly rounded; surface 

 moderately convex, rather finely, densely punctate and with long 

 pale hairs throughout, the latter also present at the base of the head 

 and on the posterior part of the interocular surface; scutellum large, 

 very obtuse; elytra three-fifths longer than wide, one-half wider 

 than the prothorax, gradually dehiscent from basal third, the sides 

 parallel, arcuately converging in apical two-fifths, the apices rather 

 narrowly and obliquely rounded, the sutural angles only feebly prom- 

 inent; punctures coarse, impressed, somewhat close and irregular, 

 the surface rugulose but shining, the raised lines barely observable; 

 sterna densely punctate and pubescent; legs moderate, the tarsi 

 very long, slender, the posterior more than three-fourths as long as 

 the tibiae, with sparse bristling hairs and two very fine tomentose 

 lines beneath. Length (c?) 21.0 mm.; width 8.8 mm. Colorado. 



pubicollis n. sp. 



Body narrower and more elongate, very dark castaneous, the legs con- 

 colorous, the antennae a little paler, shining; head very small, scantily 

 pubescent, in form as in the preceding but with the eyes separated 

 by not quite their own width; antennae (d") and palpi similar, the 

 last joint of the former less elongate and with the protuberance well 

 beyond the middle: prothorax similar but more coarsely and sparsely 

 punctate, the pubescence not so long and far less close, differing 



