F-480483 
FIGURE 71.—Adult of the southern pine sawyer, Monochamus titillator. 
Two years are required to complete the life cycle in the Lake 
States and Canada. Farther south there is one generation per 
year. Adults emerge through circular holes cut in the bark and 
feed for short periods on needles and tender bark of various 
conifers. Eggs are then deposited in slits or niches chewed in the 
bark, preferably near old branch scars or in wrinkled areas on 
logs, pulpwood, and recently killed trees (773, 618). 
The white-spotted sawyer causes heavy losses to sawlogs and 
pulpwood in the Northern States and southern Canada. Damage 
to sawlogs can be prevented by cutting the trees between Sep- 
tember and early June and removing them from the woods before 
F-496927 
FIGURE %72.—Adults of the 
white-spotted sawyer, Mon- 
ochamus scultellatus. 
204 
