SCUDDER. NORTH AMERICAN CEUTHOPHILI. 107 



femora distinctly stouter than the middle femora, very little longer 

 than the pronotum and much less than half as long as the fore femora, 

 the inner carina, at least in the male, with a couple of minute sub- 

 apical spines ; fore tibiae much stouter in the $ than in the 9 . 

 Middle femora with two (<J) or 0-1 (9) spines on the front carina, 

 the hiud carina quite unarmed, even wanting a genicular spine. Hind 

 femora about two and a third times longer than the fore femora but 

 much shorter than the body, very stout, being about two and three 

 quarters times longer than broad (narrower in the 9 ), the upper surface 

 with 3-4 raised points on its inner edge, the outer carina in the male 

 elevated, arcuate, with about eleven subequal small triangular spines in 

 the distal half, in the female hardly elevated with similar but very 

 feeble spinules, the inner carina with a series of smaller denticulatious, 

 the intervening sulcus narrow, but in the male deep. Hind tibiae very 

 stout, much shorter than the femora, broadly and faintly arcuate, but 

 in the female this is scarcely perceptible, armed beneath with a single 

 subapical spine besides the apical pair; the five (<?) or six (9) pairs 

 of spurs are subalternate, the basal at about the end of the proximal 

 fourth of the tibia, increasing in length from the first to the penulti- 

 mate, the ultimate and the three calcaria then decreasing in reverse 

 order, the proximal not much more than half as long as the distal and 

 much shorter than the tibial depth, the distal spurs more closely 

 crowded than the proximal, and lacking between them the few and 

 irregular spines of the second order found between the proximal, all 

 set at an angle of 60-70 with the tibia and divaricating 20-30 only, 

 the whole feebly incurved, their tips perhaps slightly more ; calcaria 

 'of opposite sides subequal, the longest (uppermost) shorter than the 

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

 the first and fourth joints subequal and either of them more than twice 

 as long as the subequal second and third joints together. Cerci slender 

 and no longer than the width of the hind femora. Ovipositor slender 

 and of uniform width excepting a slight apical expansion, about as long 

 as the hind tibiae, the tip acutangulate, at an angle of about 40, 

 slightly upturned, the inner valves crenato-denticulate with four 

 projections which face posteriorly. 



Length of body, $ 11.5 mm., 9 9.5 mm.; antennae, $ 31+ mm., 

 9 (est.) 18+ mm. ; pronotum, 4 mm., 9 3 mm. ; fore femora, 

 $ 4.3 mm., 9 3.35 mm.; hind femora, $ 9.9 mm., 9 8 mm.; hind 

 tibiae, $ 8.5 mm., 9 6 mm. ; ovipositor, 6 mm. 



1 <?, 1 9 . Colorado, H. K. Morrison, the $ at an elevation of 

 7,000', the 9 at one of 5,000' (the therefore probably in the Ute 

 Pass, the 9 on the plains between Denver and Colorado Springs). 



