A Sawfly Injurious to Young Pines. 7 
The cocoons (fig. 7) have been found several inches underground 
and only in this location; but it is quite possible that some larvee, es- 
YEAR I YEAR IE YEAR II 
Hig. 6.—Chart showing life and seasonal history of Leconte’s sawfly through the 
active period of three years (November to March omitted, the insect being in the 
cocoon during this period). 
pecially those the adults of which will issue before winter, may spin 
their cocoons in more exposed places, even on the pine twigs. \The 
I'ig. 7.—Cocoons of Leconte’s sawfly: At left, unopened ones containing the insects; at 
right, those from which adults have issued (emergence holes shown). The females 
issue from the larger cocoons and the males from the smaller ones. Approximately 
natural size. 
cocoons are tough, papery, red-brown, capsule-shaped cases, five- 
sixteenths to seven-sixteenths of an inch Iong. 
