Packard.] 
INSECTS OF THE GARDEN. 
45 
the first week in June feeding on the currants, and by the 
8 th of June they spin their cocoons, which are of silk, tough, 
dense, like parchment, and at first green, then becoming 
blackisl}, and covered with particles of dirt, and attached to 
the leaves in the breeding box. Here they remain between 
two or three weeks in June, the adult flies (in Salem) 
appearing June 25th. At nearly the same date (June 29th) 
the worms of the second brood were spinning their cocoong. 
fig. 35. 
These cocoons (belonging to the second brood) remain under 
ground or on the leaves about the roots through the winter, 
the flies appearing in the spring and laying their eggs as 
soon as the leaves unfold. 
Not having specimens of both sexes of this saw fly at 
hand I compile the following description (often using their 
own words) from Messrs. Walsh and Riley’s account in the 
