70 Farmers’ Bulletin 1169. 
the adult moth (fig. 49, 4) emerges from it. Soon after mating 
the female begins laying her eggs (fig. 49, 4a), from 300 to 400 in 
number, a few in a place and preferably near wounds or scars. 
The hatching of the eggs and penetration of the resulting cater- 
pillars (fig. 49, 8) 
to the heartwood 
complete the life 
cycle to the point 
from which its de- 
scription was begun. 
Prevention.— 
Avoid wounding 
trees; dress wounds 
with tar or paint 
them (p. 14-15) after 
they, are made. 
Remedies.—Cut 
off during the winter 
and promptly burn 
all infested wood. 
Inject carbon disul- 
phid (p. 14) into the 
wounds and prompt- 
ly plug them with 
putty, grafting wax, 
or similar substance. 
MAPLE AND OAK 
TWIG-PRUNER.” 
Fic. 49.—Carpenter worm and work: 4, Female at rest on 
the bark; ja, dark colored eggs deposited loosely in the : 
crevices ; 5, empty pupal case partly sticking out of the While not a menace 
Latent of injury.— 
poo pape wae ts al 2 lee ee oe a” 
eaterpillar at work in a small twig; 9, irregular burrows the work of the 
of full grown caterpillars. (Felt.) maple and oak twig- 
pruner, which is often very abundant, tends to destroy the shape and 
thereby to mar the appearance of trees, besides littering with débris 
the ground beneath them. 
Recognition of work.—During the summer and fall the ground 
beneath trees.is found more or less strewn with small twigs, showing 
a clean cut at the larger end (fig. 50) with a. burrow in the center 
plugged with wood shavings. Quantities of such twigs may also be - 
hanging from the tree. Freshly fallen twigs, when split in two, dis- - 
close the hollowed-out interior and usually at some point within the 
10 Hlaphidion villosum Fab. 
a 
eo 
“= = 
a 
ae ee ee 
