144 TENTHKEDINID^I. 



309. Nematus corniger. 



Nernatus corniger, Nort. Proc. Bost. Soc. viii. p. 159 (1861) id. 

 Tram. Amer. Ent. Soc. i. p. 199 (1S67). 



Hab. United States. 



a. $ . New York. E. Boubleday. 



310. Nematus luteolus. 



Nematus luteolus, Nort. Trans. Amer. Ent. Soc. i. p. 200 (1867). 

 Hab. North America. 



311. Nematus Saskatchewan. 



Nematus Saskatchewan, Nort. Trans. Amer. Ent. Soc. i. p. 200 

 (1807). 



Hub. North America. 



312. Nematus violaceipennis. 



Nematus violaceipennis, Nort. Trans. Amer. Ent. Soc. i. p. 201 

 (1867). 



Hab. North America. 



313. Nematus Calais. 

 (Plate VII. fig. 11.) 



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



Head and thorax black, finely punctured; pleura and pectus 

 shining; abdomen testaceous, the two last segments blackish; legs 

 testaceous, four front femora blackish at base, intermediate tibiae 

 with a dark line above; hind tibiae and tarsi blackish, the former 

 rather widened and flattened. Wings hyaline, with piceous stigma 

 and nervures ; fore wings clouded in the middle, and with apparently 

 only three submarginal cells, the two first being divided by a white 

 . nervule. 



Hab. Arctic America. 

 a. $ . (Type of species.) Mackenzie River. Br. Rae. 



314. Nematus nigritus. 



Nematus nigritus, Nort, Proc. Bost. Soc. viii. p. 159 (1861); id. 

 Trans. Amer. Ent. Soc. i. p. 201 (1867). 



Hab. United States. 



