SHADE TREE INSECTS 141 



v?e tunnel through sapwood and kill trees; grubs 

 pass winter nearly full grown- in galleries under 

 bark. 



Control — Cut out badly infested trees and af- 

 fected portions of others and burn before June. 



The snow^-white linden moth ^ (Ennomos 



siibsignarms) 



Order — Lepidoptera 



Half a century ago this insect was a pest of 

 shade-trees in Brooklyn and Philadelphia; became 

 abundant again in 1907, and then was injurious in 

 forests of New York for four years ; the moths are 

 pure white and have the habit of appearing in enor- 

 mous numbers around lights in cities where their 

 appearance has been compared to snowstorms. 



Eggs are laid on branches in masses of 20 to 100 

 or more in June and July ; hatch the next spring in 

 April and May; caterpillars strip leaves and mature 

 in June and July and pupate in loose cocoons on 

 leaves; moths appear from middle of June to last 

 of July and soon deposit eggs ; one brood a year. 



Control — On fruit trees spray with arsenate of 

 lead, 2}4 pounds to 50 gallons of water; no control 

 for forest trees known. 



The brown-tail moth ^ (Euproctis chrysorrhoca) 

 Order — Lepidoptera 



Probably introduced from Holland on shipments 

 of roses by nursery in Somerville, Mass., about 

 1893; now in Massachusetts, Rhode Island, Con- 

 necticut, New Hampshire and Maine; the larvae 

 feed on pear, apple, cherry, peach, and other fruit- 

 trees and on forest-trees; the moths are pure 

 white with a tuft of brown hairs on end of abdo- 

 men, hence name, ''brown-tail" moths; the hairs of 



8 Herrick— Cornell Univ. Expt. Stat., Bull. 286. 



