&l)e Commomwealtt) of MassattyuBttts. 



STATE BOAED OF AGRICULTURE. 



ECONOMIC BIOLOGY — BULLETIN No. 3. 



THE NATURAL ENEMIES OE BIRDS. 



By EDWARD HOWE FORBUSH, 

 State Ornithologist. 



BOSTON: 



WEIGHT. & POTTER PRINTING CO., STATE PRINTERS, 



32 DERNE STREET. 



1916. 



