TION LIB 
oii 
27 
NATURAL ENEMIES. 
A parasitic enemy of this species was reared by the writer from 
larvee received from Allegheny, Pa., in 1904. It issued October 20, 
and proved to be a tachina fly, Zachina rustica Fall. 
In Europe an ichneumon fly, Cryptus emphytorum Boie., is para- 
sitic upon this sawfly. 
REMEDIES. 
The remedies are the same as for the American rose slug, subject, 
however, to the same changes as for the bristly rose slug. 
Approved: 
JameES. WILSON, 
Secretary of Agriculture. 
Wasuinoton, D. C., August 4, 1908. 
[Cir. 105] 
O 
