A REVISION 



OF THE 



NORTH AMERICAN SPECIES OF THE 



TIPULID GENUS PACHYRHINA 



MACQUART, WITH DESCRIPTIONS 



OF NEW SPECIES 



(DIPTERA) 



by 



William G. Dietz, M. D. 



From the Transactions of the American Entomological Society, xliv, 1 05 -1 40 



Issued May % 1918 



No - 776 .-!JWW> 10,3 91 S 



