101. TENTHREDO. 315 



femora are rufous beneath. One specimen has two yellow spots above 

 the hind coxae. Wings yellowish hyaline, with brown nervures. 



Hab. Hudson's Bay. 



a-e. tf$. (Types.) St. Martin's Falls, Dr. Barnston. 



Albany River. 



155. Tenthredo cressonii. 

 (Plate XII. fig. 12.) 

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



Black; first two joints of the antennae more or less distinctly 

 reddish ; cheeks black or red, or the lower part yellow or red ; face 

 yellow. Abdomen red ; more or less of the two first segments and 

 the sides of the two following black above and below. Legs red ; 

 four anterior femora generally with a black line above at the base ; 

 hind femora, at least above, tips of tibiae, and at least the first joint 

 of the tarsi black. Wings yellowish hyaline, with brown nervures ; 

 costa yellow ; extremity of stigma brown. 



Evidently a variable species. 



Hab. Hudson's Bay ; Nova Scotia. 



a, b. 2 - { /"V \ Nova Scotia. Lieut. Redman. 



c,d. $ . f ^yP es ^ St. Martin's Falls, Dr. Barnston. 



Albany River. 



156. Tenthredo vapida. 

 (Plate XII. fig. 7.) 



Exp. al. 7-11 lin., long. corp. 4-5 lin. 



Black ; face, inner and lower orbits, collar, two spots over the 

 hind coxae, and sometimes the scutellum and cenchri, yellow. Abdo- 

 men with segments 3 and 4 or 3-5 red in the female ; in the male, 

 the abdomen is red, with the last two or three segments black above. 

 Legs red, all the femora usually with a black line above ; in the 

 female, the hind femora and the tips of the hind tibiae are likewise 

 black. Wings hyaline, with brown nervures ; costa and stigma 

 brown. 



Hab. Hudson's Bay. 



a-f. S $ • (Types.) St. Martin's Falls, Dr. Barnston. 



Albany River. 



157. Tenthredo piceocincta. 



Allantus piceocinctus, Norton, Bost. Journ. vii. p. 240 (1860). 

 Tenthredo piceocinctus, Norton, Proc. Bost. Soc. ix. p. 120 (1861) ; id. 

 Trans. Amer. Ent. Soc. ii. p. 236 (1868). 



Hab. United States. 



a. 2 • United States. 



