J f. The White-marked Turrock Moth, Orgyia 

 Leuco-sligma, in Western New York. 



Numerous complaints concerning the depredations of this insect 

 in apple-orchards liave recently come from fruit-growers in the 

 western part of the State, especially from Tates and Ontario 

 counties. One fruit-grower in this vicinity reports that 25 percent, 

 of his apple crop has been ruined this year by this insect. The 

 injury is done by the caterpillars alone, which feed not only upon 

 the foliage but upon the young apples as well. They gnaw into 

 the sides of the apples, thus causing them to become withered and 

 deformed. 



This destructive caterpillar is very striking in appearance. It is 

 quite slender and covered with hairs of various lengths and colors. 

 The j^revailing color is bright yellow. The head and two tubercle- 

 like projections on the back are coral-red. The four tufts of hair 

 on rheback are white. The two long plumes in front and the one 

 at the posterior extremity are black. A broad black stripe runs the 

 full length of the back, and on each side is a broader dark brown 

 or black one. Along the sides, arranged in two rows, are numerous 

 yellow tubercles, from which radiate pale yellow hairs. 



The adult insect is a moth. The female is wingless, light gray in 

 color, and if examined soon after she emerges from her cocoon, will 

 be found greatly distended with eggs. The males are provided 

 with four dark brown wings, marked with a few dark wavy lines 

 and a white spot on the inner angle of each anterior wing. Not 

 being able to fly, the female clings to the outside of her cocoon, 

 upon which she deposits her eggs, fastening them in place by a 

 gelatinous frothy mass, which soon becomes hard and brittle. 

 Usually one or two dead leaves will be found sticking to the mass. 

 According to Mr. Saunders, a single female will deposit from 300 

 to 500 eggs in one of these masses. 



It is in this state that the insect passes the winter, the eggs lying 

 dormant until about the middle of May or fii*st of June, when the 

 young caterpillars are hatched. They quickly spread to various 



