132 



Bulletin Wisconsin Natural History Society. [Vol. 9, No. 3. 



3-6 $ $ Ontario ; coll. Walker. 



7. $ Manchester, Me., June 9, 1898, Miss Wadsworth ; U. S. 



N. M. 

 8 ? Ithaca, N. Y., Banks; U. S. N. M. 



9. $ Same. 



Figure 7. — T. can is MacLachlan. 



This is the species recorded by most American authors as 

 spinosa. The species is one of the most easily distinguished of 

 Tetragoneuria. The tubercles on the appendages of the male and 

 the general flavescent tinge of the wings will determine it from 

 its allies. I have not seen the vulvars of the female, as the speci- 

 mens on hand are broken. 



Tetragoneuria costalis Selys. 



Male unknown. 



* Female. — Head yellow, the space between the yellow frontal 

 tubercles and the clypeus black, the clypeus yellow, thickly punctured, 



* The following description is a literal copy from a letter by Mr. Kirby, 

 June 14, 1911. 



