SCDDDER. NORTH AMERICAN CEUTHOPHILI. 75 



slender. Fore femora no stouter than the middle femora, less than a 

 quarter longer than the pronotum and somewhat less than half as long 

 as the hind femora, the inner carina with a single minute spine, at least 

 in the , besides a distinct preapical spine. Middle femora with a 

 single spine (9) or 2-4 spines (c) on the front carina, and on the 

 hind carina about four spines (generally fewer in the ?) besides a 

 short genicular spine. Hind femora nearly as long as the body, 

 distinctly more than twice as long as the fore femora, not very stout, 

 being about three and a quarter times longer than broad, glabrous, the 

 surface with no raised points, the outer carina elevated, armed with 

 about ten unequal and inequally separated spines, the largest stouter 

 than and about as long as the tibial spurs ($) or scarcely elevated and 

 unarmed (9), the inner carina with distant raised thick points, occa- 

 sionally becoming minute spines (<) or unarmed (9), the interven- 

 ing sulcus narrow. Hind tibiae as long as the femora, straight in the 

 9 , strongly bowed on proximal half in the $ (unless immature), 

 armed beneath with a single preapical spine besides the apical pair ; 

 spurs subopposite, the basal at about the end of the proximal third of 

 the tibia, scarcely if at all longer than the tibial depth, set at an angle 

 of about 50 with the tibia and divaricating about 100, their tips in- 

 curved ; inner middle calcaria about a third longer than the outer, 

 twice as long as the others or as the spurs, but hardly more than half 

 as long as the first tarsal joint. Hind tarsi less than half as long as 

 the tibiae, the first joint nearly as long as the rest together, the second 

 more than twice as long as the third and with it fully as long as the 

 fourth. Cerci stout, tapering, pointed, hardly more than half as long 

 as the femoral breadth. Ovipositor almost as long as the hind tibiae, 

 rather slender, equal from close to the base to near the tip, gently 

 arcuate, the tip barely upturned and pointed at an angle of not less 

 than 59, the inner valves scarcely armed, the teeth being barely in- 

 dicated by a slight crenulation. 



Length of body, $ 13 mm., 9 10 mm. ; pronotum, $ 4.7 mm., 

 9 3.65 mm. ; fore femora, $ 5.5 mm., 9 4.5 mm. ; hind femora and 

 tibiae, each, $ 12.9 mm., 9 9.4 mm.; ovipositor, 8.5 mm. 



6 , 3 9 . Colorado 7-8,000', H. K. Morrison ; South Park, Col- 

 orado, 8-10,000', August 11-16, S. H. Scudder. I also place here an 

 immature 9 taken by me at Pueblo, Colorado, 4.700', August 30-31. 

 Since the description was written, Mr. L. Bruner has sent me 1 $ , 

 2 9, from Brush Creek, Custer Co., Colorado, 10,000'. and Granite, 

 Colorado. 



