238 EDWARD NORTON. 



Black, mouth yellow, legs rufous, apical half of hinder tibife and the tarsi 

 black. Length 6.48.— 52. Br. wings 0.96.— 1.00 inch. 



9 . — Black, body long, not very stout; antennae reaching to about 

 the second segment of abdomen, slender, slightly flattened beyond the 

 middle; third joint longer than fourth, all the joints enlarged at tips; 

 color rufescent, darkest toward base ; nasus, labrum, mandibles and 

 a spot above posterior coxas straw color, tegulae ferruginous or yellow, 

 cox» and all the legs orange-red, apical half of posterior tibia? and 

 their tarsi black; wings hyaline, very faintly smoky, stigma dark, mar- 

 ginal cross-nervure bent. 



North West Territory. (Say) Maine, Massachusetts, Canada. 



Var- a. 9 . — The lower half of cheeks rufous. Maine. 



Var. h. 9 . — Collar yellow. Illinois. 



A''ar. c. 9 . — Collar, lower half of cheeks and a dot on pleura yellow. 

 Labrador. 



A specimen from Massachusetts has the legs ochre-yellow, agreeing 

 with Kirby's Allantus leucostoma. 



This seems to be the same with Tenthredo rujjpes, Ziegler. Europe, 

 Le Pel. Mon. Tenth. 81. 239. 



29. Tenthredo concessus, n. sp. 



Black; mouth and spots over hinder coxfe yellow; tibire and tarsi rufou3. 

 Length 0.48. Br. wings 0.96 inch. 



9 . — Black ; antenna) moderate ; third joint nearly twice as long as 

 fourth; labrum pointed; nasus, mouth beneath, spot on sides of basal 

 plates and spot above posterior coxae, yellow ; legs black, with the apex 

 of four anterior femora, the four anterior and basal half of posterior 

 tibiae, spurs and all the tarsi yellow-red; wings yellowish-hyaline, stigma 

 piceous, basal half pale. 



Good Hope, Mackenzie River, H. B. T. (R. Kennicott.) 



:J0. T. fiavomarginis. 



AJlantus flavomarginis, Norton, Bost. Jour. vii. 1860, 254. 55. 9- 

 Tenthredo fiavomarginis, Norton, Bost. Proe. ix. 121. 

 Black ; mouth, cheeks, tegulse, collar and sides of basal plates yellow. Length 

 0.50. Br. wings 1.00 inch. 



9 . — Black, abdomen long and not stout; antennae long, third joint 

 longer than fourth; edge of nasus black; nasus and mouth below, spot 

 on cheeks, tegular, two edges of collar, sides of basal plates and spot 

 beneath, straw-white; legs black; most part of anterior pair and the 

 medial tibia) at tip and apical tarsi whitish ; wi)igs hyaline, clouded to- 

 ward apex, stigma mostly black. 

 Farmington, Connecticut. 



One female. Another specimen, from the Notch, White 3Iountains, 

 has the antenna) shorter and the medial tibiae whitish before. 



