I04 



FORESTRY IN NEW ENGLAND 



are winged and some wingless. The young of the latter are oval 

 in shape, somewhat flattened, and of a yellowish-brown tint. As 

 these develop they become darker colored, and finally almost 

 black. The wool-hke covering serves to hide the insect and 



By permission of the Conneclicut State Forester. 

 Fig. 44. — A white pine tree 27 years old seriously attacked by the' white 

 pine aphid. 



gives it the appearance of a ball of down. The winged species 

 are of a Kght-reddish tinge; their white wings expanding rapidly 

 become transparent, but the bodies become almost black. 



Life History. — The eggs laid by the wingless females begin 

 to hatch early in May, and the young, emerging in large numbers 

 from the bulbs of wooly matter, spread over the bark at the base 



