92 PROCEEDINGS OF THE AMEBTCAN ACADEMY. 



Length of body, ,/ . 17 nun., 9- 22.5 mm.; pronotum, </ . 1.75 mm., 



9. 5.5 nun. ; lure femora, J, 4.75 nun., 9> '■•"' nun.; hind femora, £ , 



17 nun .9. 18 nun.; ovipositor, 20 nun. 



_' /. 19. Ruby Valley, Nevada, Ridgway; mountains near Lake 

 Tahoe, Nevada, Oct. l 1, Eienshaw, Lt. Wheeler's explorations of L876. 



The female, which alone comes from the last named . may pi 



bly belong to a distinct Bpecies; it differs in having a darker and more 

 uniform coloring, with nearly uniformly fuscous lateral lobes (except the 

 lnteons patch) as well as in the points brought out in the description. 



Cacopteris aequalis .sp. nov. 



Fusco-testaceous, often clouded with fuscous, generally hut not always 

 with a fuscous patch on the lateral lobes of the pronotum, posteriorly 

 overhanging a crescentic luteous bordering to the lower margin ; face gen- 

 • rally a little lighter colored helow the lower level of the eyes; antennas 

 nearly twice as long as the body, luteo-testaceous ; tegmina of male testa- 

 ceous, with a distinct black spot at the apex; bind femora testaceous, 

 generally more or less infuscated, occasionally streaked longitudinally 

 with blackish fuscous externally. Pronotum scarcely longer than inferior 

 breadth, with deep lateral lobes, the lower margin Btrongly bent-arcuate, 

 with a slight posterior sinus. Legs long, the lore femora nearly or quite 

 as long as the pronotum, the fore tibise with a pair of spines on the 

 upper inner margin, the hind femora slightly longer than the body. 

 Supraanal plate of male with an apical pair of rather widely separated, 

 slender, acuminate denticulations, as long as the body of the plate, reach- 

 ing nearly as far as the tip of the subgenital plate, and separated by a 

 wide U-shaped sinus ; cerci stout and cylindrical in basal half, the apical 

 half forming an inlient, apically incurved. Blender, tapering hook, spring- 

 ing from the inner apical part of basal portion ; BubgenitaJ plate apically 

 rectangularly emarginate, the styles moderate, neatly as long as the apical 

 breadth of the plate; ovipositor faintly upeurved, about as long as the 

 hind femora. 



Ij ngth of body, /, 19.75 mm , 9. '21 mm.: pronotum, c£, 5.25 nun.. 

 9,5.5 mm.; fore femora, J . 5 mm., 9, 5.75 mm.; hind femora, g , 

 20.5 nun., 9' 22 111111.; ovipositor, 22 nun. 



9 ,'. 5 9. Los Angel.-. Cal., July 26, A. P. Morse, D. W. Coquil- 

 lett; Cahon Pass, Cal., July 19, A. P. Morse. Two immature 9 from 

 Mt. Wilson, Altadena, Cal., duly 27. A. 1'. Morse, may also belong 

 here. Other Bpecimens are in the U. S. National Museum. 



