6 Farmers’ Bulletin 1259. 
the following year, a complete colony developmental period of 14 
months. If the eggs are laid and hatch in the late summer, adults of 
brood A of these eggs issue from their cocoons in the spring and early 
lig. 5.—Terminal of young scrub pine showing defoliation and feeding work of larve 
of Leconte’s sawfly on bark, Three-fourths natural size. 
summer of the following year, and adults of brood B of the same batch 
of eggs emerge from their cocoons in the late summer and early fall of 
the same year as brood A, making a complete colony developmental 
period of 12 months. (See diagram, fig. 6.) 
