16H VROCKKlilMiS OF TIIK S.\THt\AL MVSh.VM. vouxx. 



luinowtMl alM)Vi> till"! <M'elliiH, a.s hrojul us tlu' iiitersi>a<'r In'tufeii tlit» 

 ey**H, IW'bly «l<'|»rcsH(Ml iit tin* orcllus, imiictjitr tliiMUij^liout ; eyt-s ratlin- 

 larp'' ix't very jnoiniiMMit, a^* lon^ aH tin* intraocular portion of tln^ 

 j^rnac; antonnac t*'sta<*iMms. Pnuiotiiiii ;;»'iitly widening' posteriorly, 

 tin* front margin scarcely <*onvt'\' anil frt'hly and rouinlly <'niar;;inat«' 

 in tin' niiddlc, tin- hind margin obtusely anjj^nlatc, tin* an;;l(' lounded. 

 the niedian carina distinct and rather sharp on the ineta/ona, t'eehh* on 

 the pro/ona and obsolete between the sulci: disk of proz^na piano 

 convex, passin*; almost insensibly but with a broadly roundtMl anjjle 

 into the Kubvertical lateral lobes, the lateral <-arinae feebly indicated 

 on the inetazoini; mesial half ot" the disk of the ])ro/ona very dark 

 fusco-oliva<'e<uis, bordered on either .side by lute«>ns; lateral lobes and 

 nieta/oini luteo testa<'eous with an olivaceous tin<;e, the upper hall" of 

 the lateral lobes of the pro/ona occu|Hed by a broad fusco-fulij^inons 

 ^listenin^i l»and, failing; to rea<*h the ajiteiior border and broadei- on 

 the posterior than on the anterior se(;ti<ui; pro/ona smooth. <|na<lrate, 

 a very litth* lonj;er than the closely punctate metazona. l'r<Ksternal 

 spine Ion;;, slightly appressed cylindri«-al, blunt tipped, very feebly 

 retrorse; interspace between mesosternal lobes of nnile aiiout half as 

 long again as broad, th' metasternal lobes attinuent. Tegminascart-ely 

 attaining the tips of the hind ft'inora. nioderatidy broad at base, dis- 

 tinctly tajK'ring, tiie tip narrow and strongly rounded, brownish testa 

 ceous without markings; wings pellucid, the nuiin veins testaceous, 

 the otliers blackish fuscous. Femora yellowish brown, the hind pair 

 much infuscated on the outer face, especially above, the ui»per surface 

 broadly marked with fuscous near base at tip, and with two other 

 nearly confluent belts between, the inner face feebly and tin* lower face 

 distinctly reddened; genicular arc black; hind tibiae unifcu inly red. the 

 s])iues black nearly to the base, eleven in number in the outer series. 

 Extremity of male abdomen broadly clavate, strongly upturned, the 

 sui>raanal plate rather long, triangular, with rounded sides, a<*utangu- 

 late ajiex, the basal two thirds of the lateral margins broadly elevated, 

 the median sulcus narrow and deep, extending over two-thirds of the 

 jdate, bounded by moderate walls; furcula consisting of a jiair of very 

 broad, parallel, elongated, strongly tlattened pa<ls witli rounded tips, 

 almost leaching the middle of the suiuaanal plate, their outer margins 

 broadly rounded; cerci consisting of coarse and broad, i)unctate 

 laminae, feebly narrowing in the basal half, beyond a little upturne<l. 

 equal, very broadly rounded at apex, straight or feebly outcurved 

 apically, not so long as the su}uaanal plate; infracercal jdates visible 

 only at extreme base; subgenital jdate enormously i)roduced and 

 elevated (more abrui)tly elevated than represented in the figure), the 

 apical margin deeply emarginate laterally, and well rounded and entire 

 mesially. 



Length of body, male, 27 mm. . tegmina. 18 mm. ; hind femora, 14 mm. 



One male. Salt I^ake, Utah, August 30, L. Bruuer (U.S.N.M. — 

 Riley collection). 



