THE CANADIAN ENTOMOLOGIST. 79 



to the base of the clypeus in the lateral sinuses, thence along the base of 

 the clypeus and the pseudorsal margin of the mandibles to their pseudo- 

 caudal side, the occiput, the prothorax except a small spot on the apex 

 of the collar, a spot at the apex of the median lobe of the mesothorax, 

 the side lobes entirely except a small portion at middle, the pectus, the 

 pleurae except an oblique spot at middle, the sutures of the metathorax, 

 the basal membrane, the caudal margin of the basal plates, abdominal 

 segments one to three, the venter except at apex, the anterior coxas, the an- 

 terior trochanters except beneath, the middlecoxse except beneath, the middle 

 trochanters, the middle ferhora narrowly at apex and at base above con- 

 nected by a fuscous line, the middle tibife with a line above on apical 

 half, the posterior coxae at base and apex, the posterior trochanters, the 

 posterior femora and tibi;e with a line at base and apex above, and the 

 stigma except at base ; the following parts yellow : the clypeus, labrum, 

 the mandibles, a spot above the posterior coxfe, the sides of the basal 

 plates, the anterior femora and tibiae, and the middle and posterior tibiae 

 before ; the legs except parts named, reddish-yellow ; clypeus emarginate ; 

 costa rufous, subcosta bhck ; veins rufous; third segment of the antennae 

 twice the length of the fourth. Length, 12 mm. 



Habitat. — Mount Washington, New Hampshire. 



This species is closely related to diluta. Cress. 



Tenthredo nigricoHis, Kirby. — 9 Black, with the following parts 

 white : the labrum, the clypeus, mandibles, segments six to nine of the 

 antennae, a spot above the posterior coxae and a spot on the sides of the 

 basal plates ; the four anterior tibiiB and tarsi testaceous ; wings yellowish 

 hyaline; nervures brown; costa yellowish, stigma black; collar black. 

 Length, 12 mm. 



Habitat. — Hudson's Bay Territory (Kirby), Mount Washington, New 

 Hampshire. 



This species is related to grandis, Nort., and anteimata, Kirby, but 

 it has the collar black. 



Tetithredo basilaris, Prov. — % Black, with the following parts yel- 

 lowish-white : the clypeus, labrum, the mandibles except apex, which are 

 ferruginous, the cheeks, a dot at the summit of the eyes, the tegulae, 

 collar above, a spot above the posterior coxae, the sides of the basal plates, 

 the apical half of the anterior coxae, the trochanters except a black spot 

 fibove, and the anterior ferqora and tibiae in front ; the following parts are 



