- ndtim MIDLAND 
NATURALIST | 
Devoted to Natural History, Primarily 
that of the Prairie States 
Published by the University of Notre Dame, 
Notre Dame, Indiana 
J. A. NIEUWLAND, C.S., C., Ph, D., Editor 
CONTENTS 
r Notes on Populus, Plinius e - lvar Tidestrom 29 
> Bubani’s Flora Pyrenaea : - Edward L. Greene 36 
~~ Our Birds in March and April = Brother Alphonsus, C. S.C. 54 
- PRICE $1 A YEAR ee SINGLE NUMBERS 20 CENTS 
fy FOREIGN, 5 SHILLINGS 
“Entered as sec ieed matter December 15, 1909, atthe post office at > ee %. SE Pier, 
Notre Dame, Indiana, under the Act of March 3, 1870. he rae Oey 
; THE UNIVERSITY PRESS, NOTRE DAME, INDIANA MAR V61911 
~ G " XK i 3 
™ pp 2 ad 
