148 TENTHREDINID-T,. 



338. Neinatus sumptus. 



Nematus sumptus, Nort. Trans. Amer. Ent. Soc. i. p. 207 (1867). 

 Hab. Maine. 



339. Nematus pleuricus. 



Nematus pleuricus, Nort. Trans. Amer. Ent. Soc. i. p. 208 (1867). 

 Hab. North America. 



340. Nematus discolor. 



Nematus discolor, Cress. Trans. Amer. Ent. Soc. viii. p. 8 (1880). 

 JIab. Colorado. 



341. Nematus lateralis. 



Nematus lateralis, Nort. Trans. Amer. Ent. Soc. i. p. 211 (1867). 

 JIab. North America. 



342. Nematus salicis-desmodioides. 



Nematus s.-desmodioides, Walsh, Troc. Ent. Soc. Phil. vi. p. 257 

 (1866). 



Huh. North America. 



34:5. Nematus semirufus. 



X. ■niatus fulvipes, Nort. (nee Fall.) "Proc. Bost. Soc. viii. p. 1(50 

 (1861 ) : id. Trans. Amer. Ent. Soe. i. p. 212 (1807). _ 



Hob. United States. 



34-1. Nematus obtusus. 

 Nematus crassus, Esch. I Fall). Entomogr, p. 213, n. 34 (1822). 

 Unit. Unalaschka. 



345. Nematus trifurcatus. 

 (Plate VI I. fig. 17.) 



Exp. al. 8 lin., long. corp. 4 lin. 



Testaceous, antennae black, a large square black spot on vertex ; 

 three large black spots in front and on the sides of the thorax, some- 

 times nearly confluent ; hinder half of the scutellum black : all the 

 segments of the abdomen except the last (beyond which the black 

 tips of the saws and sheaths project) are more or less broadly 

 banded with purplish black in the middle; sides and undersurface 



