310 TENTHREDINID^l. 



118. Tenthredo ventralis. 



Allantus ventralis, Say, West. Quart. Rep. ii. p. 72, n. 1 (1823) ; Nort. 



Bost. Journ. vii. p. 253, n. 33 (1860). 

 Tenthredo ventralis, Nort. Proc. Bost. Soc. ix. p. 121 (1862) ; id. 



Trans. Amer. Ent. Soc. ii. p. 230, n. 8 (1868). 



Hah. Arkansas. 



119. Tenthredo angulata. 



Tenthredo angulatus, Nort. Proc. Ent. Soc. Phil. iii. p. 18, n. 27 

 (1864) ; id. Trans. Amer. Ent. Soc. ii. p. 230, n. 9 (1868). 



Hah. United States. 



120. Tenthredo formosa. 



Tenthredo formosus, Nort. Proc. Ent. Soc. Phil. iii. p. 14, n. 28 (1864) J 

 id. Trans. Amer. Ent. Soc. ii. p. 231, n. 10 (1868). 



Hah. United States. 



a. cJ . United States. 



121. Tenthredo thora. 

 (Plate XII. fig. 2.) 



Exp. al. 9-10 lin., long. corp. 5 lin. 



Black ; face, cheeks, a narrow inner orbital line, collar, tegulse, 

 sides and hinder extremity of pectus, and all the coxse and tro- 

 chanters yellow; pleura black and yellow ; abdomen, front of pectus, 

 and legs rufous ; extremities of hind femora and tibiae above, and 

 more or less of the hind tarsi, black. Wings yellowish hyaline, with 

 brown nervures ; stigma yellow in front. In the male the pectus 

 below the pleura and the undersurface of all the femora are wholly 

 yellow. 



One specimen has the two last segments of the abdomen black. 



Hah. Hudson's Bay. 



a-g. <5 $ . (Types.) St. Martin's Falls, Al- Dr. Barnston. 



bany River. 



122. Tenthredo eximia. 



Tenthredo eximius, Nort. Trans. Amer. Ent. Soc. ii. p. 231 (1868). 

 Hah. New England. 



123. Tenthredo dissimilis. 



Allantus dissimilis, Nort. Bost. Journ, vii. p. 250, "n. 29 (1860). 

 Tenthredo dissimilis, Nort. Proc. Bost. Soc. ix. p. 121 (1862); id. 

 Trans. Amer. Ent. Soc. ii. p. 231 (1868). 



Hah. Illinois. 



