94 



FRUIT INSECTS 



being quite distinctly outlined by darker scales (Fig. 101). The 

 moths emerge and go up the trees for egg-laying at night in 

 October and November. The reddish-orange, oval, finely pitted 



Fig. 101. — Bruce's measuring-worm, nial ' Fig. 102. — Eggs of Bruce's 

 moth (X 12)- measuring-worm. Enlarged. 



eggs (Fig. 102) are usually laid singly where readily seen in the 

 crevices of bark scales on the trunk and larger branches (Fig. 103). 

 The eggs hatch in April, or as soon as the buds begin to open. 



The young canker-worms 

 often bore into the buds and 

 continue feeding for 4 or 5 

 weeks. They seem to be par- 

 ticularly fond of the opening 

 flower buds on apple, and 

 thus often ruin a prospective 

 crop. The full-grown Bruce's 

 canker-worms are about f of 

 an inch long and of a general 

 apple green color, with three 

 narrow yellowish-white stripes 

 along each side of the body 

 (Fig. 104). There are two pairs of pro-legs, and the head, 

 thoracic and anal shields, and a large spot on the anal pro-legs, 



Fig. 103. — Eggs of Bruce's measur- 

 ing-worm tucked behind a bit of lichen 

 on a tree trunk. Enlarged. 



