284 THE CANADIAN ENTOMOLOGIST. 



the cheeks, the tegulje, the latero-dorsal angles of the pronotum, a spot 

 above the posterior coxae, a spot on the sides of the basal plates, a fine 

 line on the apical margin of the basal plates and the first and second 

 abdominal segments, the front and middle legs, including the coxa;, 

 beneath, the extreme apices of the posterior coxfe, and the posterior 

 trochanters beneath ; the following parts rufous : the posterior legs 

 beneath beyond the trochanters, the tergal segments beyond the second, 

 the sides of the third and fourth abdominal segments, and the ventral 

 segments beyond the fifth, including the guides of the ovipositor ; the 

 clypeus squarely emarginate ; the third segments of the antenna one- 

 third longer than the fourth ; the wings subinfuscated ; the costa and the 

 base of the stigma rufous ; the veins black. Length, 12 mm. 



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



This species is related to iiigricoxus and -^<?//a ; from the former it 

 differs in not having the pale spot above the posterior coxae wanting, and 

 from the latter in having a black line above on all the legs. 



Tenthredo cequalis, n. sp. $ . — Black, with the following parts yellow: 

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

 cheeks, the tegulae, a line on the collar, a spot above the posterior coxae, 

 the anterior tibia? beneath (the anterior femora are paler beneath; probably 

 specimens will be found in which they are yellow beneath), and the anterior 

 tarsi ; the following parts rufous : the femora, the middle and posterior 

 tibiae and tarsi (the anterior tibia? have a fine black Hne above), a spot on 

 the middle of the second and third tergal segments, larger on the third, 

 the tergal segments beyond the third, and the ventral segments beyond 

 the fifth except the ventral margin of the ovipositor ; the clypeus squarely 

 emarginate ; the third segm.ents of the antennae twice the length of the 

 fourth ; the wings hyaline, the veins black ; the costa and the stigma at 

 base luteous. Length, 5 mm. 



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



This species is related to liinatus and olivatipes; it differs from the 

 former in having a pale spot above the posterior coxje, and from the latter 

 in having the scutellum black and the legs rufous. 



Tenthredo ventricus, n. sp. S- — Black, with the following parts 

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

 beneath the antenna;, the cheeks, a fine line on the collar, a spot above 

 the anterior coxae, a spot above the posterior coxae, and a spot on the 

 sides of the basal plates ; the following parts rufous : a fine line on the 



