LIST OK PAPERS. 



PAGE 



Back (Ernest A.). 



The Robber-flies of America north of Mexico, belonging to 

 the Subfamilies Leptogastrinnae and Dasypogoninae. 

 (Plates II-XII) 137 



Cameron (P.)- 



A contribution to the knowledge of the Parasitic Hymenop- 



tera of Argentina 419 



Ewing (H. E.). 



New Species of Acarina. (Plates XIII-XVI) 401 



Fall (H. C). 



Revision of the species of Diplotaxis of the United States. 



(Plate I) 1 



Rohwer (S. A.). 



New Hymenoptera from Western United States 99 



