318 TENTHREDINID^l. 



170. Tenthredo hudsoni. 

 (Plate XII. fig. 15.) 



Exp. al. 10 lin., long. corp. 5 lin. 



Black ; antennae more or less piceous, the third joint longest, 

 fourth and fifth of equal length, the remainder shorter; face, a 

 triangle above, lower orbits, collar, scutellum, cenchri, and two 

 spots above the posterior coxae yellow ; tegulae reddish ; legs rufo- 

 testaceous, four hind femora and part of the apex of the tibiae above 

 black ; segments 3 and 4 of the abdomen more or less reddish above. 

 Wings yellowish hyaline ; nervures reddish brown. 



Hah. Hudson's Bay. 



a-e. 2 • (Types.) St. Martin's Falls, Dr. Barnston. 



Albany River. 



171. Tenthredo borealis. 

 (Plate XII. fig. 13.) 



Exp. al. 9 lin., long. corp. 5 lin. 



Black ; antennae piceous, especially at the base ; face, collar, tegulae, 

 cenchri, and two spots above the hind coxae pale yellow ; legs yel- 

 lowish, tarsi shading into reddish ; a line above the anterior femora, 

 the four hind femora, and the tips of the hind tibiae black. Segments 

 4-7 of the abdomen with rufous markings ; segment 5 entirely 

 rufous above and below. Wings yellowish hyaline, with brown ner- 

 vures ; costa yellow, extremity of the stigma brown. 



Hah. Hudson's Bay. 



a, b. $ . (Types.) St. Martin's Falls, Dr. Barnston. 



Albany River. 



172. Tenthredo cinctitibiis. 



Tenthredo cinctitibiis, Norton, Trans. Amer. Ent. Soc. ii. p. 239, n. 31 



(1869). 



Hah. Hudson's Bay. 

 a-c. 2 • St. Martin's Falls, Albany River. Dr. Barnston. 



173. Tenthredo decorata. 



Tenthredo decorata, Provancher, Nat. Canad. x. p. 200 (1878). 

 Hah. Canada. 



174. Tenthredo fumipinnis. 



Tenthredo fumipennis, Norton, Trans. Amer. Ent. Soc. ii. p. 239, n. 32 

 (1869). 



Hab. California. 



