78 rROCEEDINGS OF THE NATIONAL MUSEUM. vouxx 



removed tVoin the margin, and below the oeelhis it is narrowed, suh^ate. 

 and tails to reat'h the clypeal suture. Prozona feebly and sparsely, 

 meta/ona ilensely and rather sirouj»ly, jHiiietate on the disk, the for- 

 mer anteriorly with a submarginal transverse series of more distinct 

 l)un(*ta, becominji' n»esially a chmble series; the posterior sulcus of the 

 prozona swerves broadly backward and is completely continuous; that 

 in front of it is rather shorty not infringing on the lateral lobes, rigi<lly 

 transverse and feebly continuous. Supraanal plate of male triangular. 

 Avirli almost straight lateral margins, subacuminate ajjex, fully as long 

 as broad, with a pair of submedian. suljparallel, rather elevated ridges, 

 fading ])osteriorly, inclosing a deep median sulcus; furcula consisting 

 only of a rather distinct but obtuse angle on either side of a re»*tangu- 

 lar median emargination of the last dorsal segment; cerci very slender 

 (slenderer than api)ears by the rtgure), as long as the supraanal i)late. 

 tapering considerably in the basal half, e<iual and very feebly incurved 

 in the a]»ical half, apically blunt : infracercal plates rather broad, hardly 

 narrowing apically, shorter than the infraana late. 



Length of body, male, 17.25 mm., female, 18..") mm.; antennae, male. 

 7 mm., female, T).! mm.: tegmina, male, 10 mm., female, mm.: hind 

 femora, male, S.'.i mm., female. 10.2 mm. 



One male, 1 female. Fort VVhii)ple, Yavajiai County, Arizona. E. 

 Palmer; Truckee \'alley, Nevada, H. ]*idgway. 



The tegmina are considerably larger than the abdomen in the male 

 from Arizona; S(»mewhat shorter than the abdomen in the female from 

 Nevada. 1 am not at all contident that the two belong together, and 

 my description is therefore based almost wholly upon the male. 



g. AEOLOPLUS ARIZONENSIS, new species. 



(Plate VI, tig. 3.) 



Jfesperoieitix rhidis SciddekI, Aim, Rep. Chief Eng.. 187«) (1876), p. 506; Aiiii. 

 R«'p. (ieol. (ieogr. Snr\ . 100th iiier., 1876 (1876), p. 286. 



Uniform in coloring throughout, and probably testaceous (all speci- 

 mens seen have been immersed in alcohol), except that the transverse 

 sulci of the i^ronotun) appear to have been marked with bhu'k or fus- 

 cous, there are some slight fuscous markings on the up[)er half of the 

 lateral lobes of the prozona, the tegmina are clouded and obscurely 

 dotted with fuscous, the hind femora are sometimes twice barred with 

 fuscous and have a large fuscous lunule on the geniculation, and the 

 tibial spines are black tipped. The eyes of the male .are tolerably 

 prominent; the fastigium. except at apex, is distinctly and uniformly 

 but not deeply sulcate; the frontal costa is subequal, dep i^ssed at bur 

 not sulcate below the ocelljis, percurrent. Prozona i)unctate above 

 only in the submarginal sulcus; metaz<uia densely and rather strongly 

 punctate; posterior sulcus of the prozona oblicjue on either side, making 

 a very open rounded angle me.sially, and percurrent, while that next in 

 front of it is occasionally subobliterated mesially. Tegmina considera- 



