6fi)f Hertortum 
Marvartf Universilv 
Vol. 5 (New Series) DECEMBER, 1907 No. 4 
BULLETIN 
OF THE 
WISCONSIN 
NATURAL HISTORY 
SOCIETY 
EDITED BY THE SECRETARY 
COINTENTS: 
Proceedings. 
Check List of the Flora of Milwaukee County, - - HowUnd Russel 
A New Species of Psen, Henry L. Viereck 
On the Nesting Habit of Psen barthi, - - - George P. Barth 
List of Members of the Wisconsin Natural History Society. 
Index to Vol. V. 
MILWAUKEE, WISCONSIN. 
THE EDW. KEOGH PRESS. 
Entered as second-class matter, Oct. 24, 1906, at the post-ofBce, Milwaukee, Wis., under Act of Congress 
Of July 16, 1891, (Issaed quarterly.) 
