78 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



removed from the margin, and below the ocellus it is narrowed, sulcate, 

 and fails to reach the clypeal suture. Prozoua feebly and sparsely, 

 metazona densely and rather strongly, punctate on the disk, the for- 

 mer anteriorly with a submarginal transverse series of more distinct 

 puncta, becoming mesially a double series; the posterior sulcus of the 

 prozona swerves broadly backward and is completely continuous; that 

 in front of it is rather short, not infringing on the lateral lobes, rigidly 

 transverse and feebly continuous. Supraanal plate of male triangular, 

 with almost straight lateral margins, subacuminate apex, fully as long- 

 as broad, with a pair of subrnedian, subparallel, rather elevated ridges, 

 fading posteriorly, inclosing a deep median sulcus; furcula consisting 

 only of a rather distinct but obtuse angle on either side of a rectangu- 

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

 (slenderer than appears by the figure), as long as the supraanal plate, 

 tapering considerably in the basal half, equal and very feebly incurved 

 in the apical half, apically blunt; infracercal plates rather broad, hardly 

 narrowing apically, shorter than the infraanal plate. 



Length of body, male, 17.25 mm., female, 18.5 mm.; antennae, male, 

 7 mm., female, 5.7 mm.; tegmina, male, 16 mm., female, 9 mm.; hind 

 femora, male, 8.3 mm., female, 10.2 mm. 



One male, 1 female. Fort Whipple, Yavapai County, Arizona, E. 

 Palmer; Truckee Valley, Nevada, E. Eidgway. 



The tegmiua are considerably larger than the abdomen in the male 

 from Arizona; somewhat shorter than the abdomen in the female from 

 Nevada. I am not at all confident that the two belong together, and 

 my description is therefore based almost wholly upon the male. 



9. AEOLOPLUS ARIZONENSIS, new species. 

 (Plate VI, fig. 3.) 



Hesperotettix viridis SCUDDER!, Ann. Kep. Chief Eng., 1876 (1876), p. 506; Ann. 

 Rep. Geol. Geogr. Surv. 100th nier., 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 pronotum appear to have been marked with black or fus- 

 cous, there are some slight fuscous markings on the upper half of the 

 lateral lobes of the prozona, the tegmiua 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, depressed at but 

 not sulcate below the ocellus, percurrent. Prozoua punctate above 

 only in the submarginal sulcus; metazona densely and rather strongly 

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

 a very open rounded angle mesially, and percurrent, while that next in 

 front of it is occasionally subobliterated mesially. Tegmina considera- 



