THE CANADIAN ENTOMOLOGIST. 283 



coxte, the anterior legs, including the coxfe, beneath, and the middle 

 tibiaj beneath (the middle femora have blotclies of yellow beneath, so that 

 specimens will probably be found having the femora yellow beneath); 

 the third segments of the antennse one-third longer than the fourth ; the 

 clypeus emarginate ; the wings hyaline, slightly fuscous ; the veins, 

 including the costa and the stigma, brownish. Length, ii mm. 



Habitat — Colorado. Mr. Carl F. Barker, collector. 



This species is related to flavoinarginis, from which it differs in 

 having the tegulse and basal plates black. 



Tenthredo rufostignius.w. ■s,^. (^ .—Black, with the following parts 



yellow : the clypeus, the labrum, the mandibles except at apex, the lower 



half of the cheeks, the tegulee. an abbreviated line on the caudal part of 



the pleurfe, a spot above the posterior coxae, the front and middle coxae 



except above, the posterior coxae at side, the front legs, beyond the coxae, 



beneath, and the middle trochanters and femora beneath ; the following 



pr.rts rufous : the middle tibiae beneath, the middle tarsi, the posterior 



femora beneath, the posterior tibiae and tirsi, and the abdomen, including 



the venter, beyond the basal plates except a spot on the base of the first 



tergal segment ; the third segments of the antenn:ii one-fourth longer than 



the fourth ; the clypeus squarely emarginate ; the wings slightly 



infuscated ; vems black ; the costa and the stigma rufous. Length, 



lo mm. 



Habitat— Craig's Mt., Idaho. Prof J. M. Aldrich, collector. 



This species is related to discrepans, from which it differs in having 

 the posterior femora rufous with a black line above. 



Tent/u-edo atravemis, w. ?>\^. S- — Black, with the following parts 

 rufous : the legs beyond the trochanters except a spot on the bases of the 

 femora above (the posterior tarsi are yellowish), the apex of the second 

 abdominal segment, the third, fourth, and fifth abdominal segments 

 entirely, and the base of the sixth abdominal segment; the third segments 

 of the antennae one-half longer than the fourth , the clypeus truncate ; 

 the labrum rounded, yellowish-fuscous at sides ; the wings slightly 

 clouded, more pronounced on the apical half; the veins black ; the costa 

 rufous ; the stigma yellow, fuscous at base. Length, lo mm. 



Habitat — Juliaetta, Idaho. Prof. J. M. Aldrich, collector. 



This species is related to sectilis, from which it differs in having no 

 pale spot above the posterior coxa;. 



Tent/iredo termiTidtus, n. s\:). ?. — Black, with the following parts 

 yellow : the clypeus, the labrum, the mandibles except at apex, a spot on 



