180 THE CANADIAN ENTOMOLOGIST. 



10. Cheeks marked with white it. 



Cheeks black atravenus, MacG. 



1 1. Scutellum and legs yellow : 



Black, with the following parts yellowish-white : the clypeus, the 

 labrum, the mandibles except at apex, the cheeks, the palpi, the 

 tegulfe, a large spot on the collar, a spot above both the anterior 

 and posterior coxpe, the apices of the coxfe, the legs beyond the 

 coxse (some of the tarsal segments are slightly rufous), the scu- 

 tellum, the basal membrane, the basal plates, tergal segments 

 one to four except a black line on their middle at base, the sides 

 of segments five and six, and a narrow margin on the sides of 

 those ventral segments whose tergums are wholly or in part 

 pale ; the clypeus squarely emarginate ; the third segment of 

 the antennre one-third longer than the fourth ; the wings 

 hyaline, yellowish ; the veins brown ; the costa and the stigma 

 at base, luteous. Length, 12 mm. Habitat — Olympia, Wash- 

 ington (Trevor Kincaid) oHvaiipes, n. sp. 



Scutellum black, the legs rufous 12. 



12. Tegul?e yellowish-white; abdomen rufous beyond the third tergal 



segment aegualis, MacG. 



Tegulfe rufous ; abdomen rufous beyond the first segment : 



Black, with the following parts yellowish : the clypeus, the labrum, 

 the mandibles except at apex, a lunate mark on the cheeks, a 

 triangular spot between the antennae sometimes absent, the 

 collar, and a spot above the posterior coxje ; the following parts 

 rufous : the tegulee, the legs except the bases of the coxje and 

 the sutures of the trochanters, the venter of the abdomen except 

 the sheaths of the ovipositor, and the tergal abdominal segments 

 beyond the first : the wings infuscated, the veins and stigma 

 black, the costa rufous ; the clypeus squarely emarginate ; the 

 third segment of the antenna? one-third longer than the fourth. 

 Length, 12 mm. Habitat — Olympia, Washington (Trevor 

 Kincaid) lunatus, n. sp. 



13. Posterior uh'vx. in part pale 15. 



Posterior tibia' black 14. 



14. Posterior femora wholly black remotus, MacG. 



Posterior femora rufiais, with a black line above : 



