276 THE CANADIAN ENTOMOLOGIST. 



SOME CANADIAN SAWFLIES COLLECTED BY 

 FREDERICK KNAB. 



BY S. A. ROHWER, WASHINGTON, D. C. 



In June, 1907, Mr. Frederick Knab spent some tinie in the 

 Oxbow region at Saskatchewan, where he collected a number of 

 insects. The sawflies which were collected have been given to the 

 United States National Museum, and have been determined and 

 placed in the collection. As some of the species are new to Canada, 

 and as nearly all the records will add to the distribution of the 

 species, a list of them is now presented, as it may be useful to those 

 who are editing "Insects of Canada." 



The following were collected at Oxbow, Saskatchewan, which 

 is a prairie region with a number of small ponds, around which 

 various willows grow. 



Pamphiliiis {Pamphilius) nigritihialis Rohwer. 



Arge spp. 



Cimhex americana, var. decemmaculata Urban. — Female. 



Zarœa inflata Norton. — June 15. Female. 



Dolerus agristus MacGillivray.— June 11 to 18, 1907. Three 

 typically-coloured females. Four females which have the venter 

 and the terminal dorsal segments blackish. 



Macrophya siiccincta Cresson. — Female, June 17, 1907. 



Tenthredella erythromera (Provancher). — Female, June 18, 1907. 



Empria maculata (Norton). — Female, June 19, 1907. A small 

 specimen wâth a narrow sheath. 



Hoplocampa xantha Rohwer. — Three females, June 15, 1907. 



Lycaota spissipes (Cresson). — Females, June 17 and 21 ; male, 

 June 15. 



Paracharatus rudis (Norton). — Female, June 15, 1907. 



Paracharaius nigrisoma Rohwer. — June 21, 1907. 



Monophadnus truncatus Rohwer. — June 1, 1907. 



Amauronematus lincolnensis Rohwer. — Two females, June 1, 

 1907, not typical. 



Amauronematus semirufus (Kirby). — May 30, 1907. Differs 

 in a few minor points. 



Amauronematus knabi Rohwer. — June 15 and 19, 1907. 



The following species were collected at White River, Ontario, 

 which is in the forest region to the north of Lake Superior : 

 Dolerus dysporus MacGillivray. — June 24, 1907. 

 Nematus erichsoni (Hartig). — June 24, 1907. 

 Monsoma inferntia (Norton). — Female, June 25, 1907. 



September, 1912 



