21(j VlidCEEIilSas OF THE NATIOXAL MUSEUM. volxx. 



wliat lonj;«T tlian iho infrnocular portion of tln^ jfeiuu*; antc»imae dark 

 castaneous, about tbur-tifths as l<Mif; as tlie hind femora. Proiiotuin 

 narrowest at the liiiider section of tlie ]n()zona, feebly expaiulinj; in 

 front, slijfhtly more on tlie nietazona, the pieeous postocMilar b.aiul of 

 the lateral lobes <'online<l to the jn'ozona and inconspicuous from the 

 dark color ot the insect, thoujjh broujjht slijihtly into prominence by 

 the slijxht ]Kilinj^ of the lower portion of the lateral lobes and the rufous 

 tin^ic of the si«les of the disk, the disk very broadly convex and pass- 

 inji" by rounded shoulders simulating lateral carinae into the vertical 

 lateral lobes, Avhere each half of the prozona is sli<;htly and independ- 

 ently tumid; median carina distinct and rather prominent on the meta- 

 zona, blunt on the jirozona, ])articularly between the sulci; front 

 marj;in feebly convex, hind inar<^in rotundato obtusan*:fulate; i>rozona 

 longitudinally subqua<lrate, slightly longer than the somewhat coarsely 

 punctate metazona. Prosternal spine short and stout, appressed con- 

 ical, retrorse; inters])ace between mesosternal lobes about half as long 

 again as broad. Tegmina abbreviate, I'ather broad ovate, subfusiform, 

 apically su;umiiuite, abcmt as long as the )>ronotum, attingent, bhickish 

 fuscous. Fore and middle femora consider..bly tumid in the male; hind 

 femora rather long and slender, blackish fuscous, the outer face more 

 or less and irregularly blotched with dull testace<ms, the inferior face 

 dull rufous, the whole geniculation and lower genicular lobe blackish; 

 hind tibiae very pale dull greenish, minutely tlecked with fuscous, the 

 spines black almost to the base, ten to eleven in the outer series. 

 Extremity of male abdomen feebly clavate, strongly recurved, the 

 supraanal plate long triangular, subhastate, the ai)ex subrectangulate, 

 the lateral margins narrowly elevated, the median sulcus with its low 

 rounded walls shallow, broad at extremities and narrowed near the 

 middle, where the ])late is traversed by a slight transverse ridge which 

 does not reach the margins; furcula consisting of a i)air of widely 

 divergent, slender, tapering, acuminate spines crossing nearly the basal 

 fourth of the supraanal plate; cerci broad, flat, subvertical laminae, 

 slightly more compressed at apex than at base, lying nearly in one 

 plane but feebly incurved and very faintly ui)curved, subequal, well 

 rounded apically particularly on the inferior margin, a little more than 

 twice as long as broad, falling considerably short of the tip of the 

 supraanal plate, rather coarsely punctate; subgenital plate small, feebly 

 subi>yramidal, the apex elevated only by the gradual and exceedingly 

 slight upward curve of the margin, which as seen irom above is well 

 rounded and entire. 



Length of body, male, 16 mm.; antennae, 6 mm.; tegmina, 4 mm.; 

 hind femora, 9.75 mm. 



Two males. IJabbit Ears Pass, Colorado, at the height of about 

 10,0(K) feet, or probably 1,000 feet below timber line, July liO, C. V. 

 Baker (C. P. Gillette). Mr. Baker has also sent me specimens taken 

 by him at Cameron Pass in northern Colorado at a height of 11,800 

 feet, and on Clark's Peak, Colorado, at a height of 11,700 feet. 



