INSECTS INJURIOUS TO THE APPLE. 



from this new-formed bud is late in starting, and does not 

 grow straight, the injury caused by this insect interferes seri- 

 ously with the growth of the tree, and also mars its beauty. 



A small Ichneumon fly, Microdus earinoides Cresson, attacks 

 this bud-worm, depositing an egg in the body of each cater- 

 pillar, which, hatching, produces a footless larva, that lives 

 within the body of the caterpillar until it is about ready to 

 become a chrysalis, when the larva issues from its body and 

 the caterpillar dies. The parasite spins within the silken case 

 of its host a tough white cocoon about one-fourth of an inch 

 long, from which the perfect fly issues in about a fortnight. 



Where these insects are very troublesome they may be de- 

 stroyed by syringing the trees with Paris-green or London- 

 purple mixed with water, in the proportion of one or two 

 teaspoonfuls of the poison to two gallons of water. Their 

 numbers may also be lessened by hand-picking, gathering 

 them while still in their burrows near the tops of the twigs. 



Xo, 40, The Green Apple-leaf-tyer. 



Teras minuta (Kobs) var. Cinderella (Kiley). 



This is a small yellowish-green caterpillar (a, Fig. 95), 

 with a horny head and neck of a deeper yellowish shade, the 

 head being marked with a crescent-shaped black mark. It 



belongs also to the leaf-rollers 

 or leaf-folders, and draws the 

 edges of the leaf together, as 

 shown in the figure at d, and 

 lives within the fold. In feed- 

 ing, it eats the leaf entirely 

 through. It is a very nimble 

 little creature, and when dis- 

 turbed wriggles quickly out of 

 its case and drops to the ground. 

 The larva changes to a brown 

 chrysalis (6, Fig. 95) within the fold of the leaf, which is 

 lined with silk. When the time approaches for the moth to 



FIG. 95. 



