A REVISION OF THF SOUTH AMERICAN DIPTER- 

 OUS INSECTS OF THE FAMILY 

 PTYCHOPTERID.t 



t'HARl.F.S P. AI.EXANDFR 



nulot;i>:at I.abor3lor>' of Cornell University, Ithaca, New York 



No. 1953.— From the Proceedings of the United States National Mil 

 Vol.44, pages 331-335 



Published February 20, 1913 



Washington 



Government Printing Office 



1913 



