

ANIMALS INJURIOUS TO FRUIT TREES. 19 



The eggs are deposited on the newly-exposed blossoms, stems, 

 and leaf petioles, and later the midribs and veins of the underside of 

 the leaves. 



The period of egg-laying extends over several weeks. The egg 

 stage lasts, approximately, four days. 



Fig. 8. 



Fig. 7. 



THE PEAR THRIPS. 



FIG. 7. Larva. Much enlarged. FIG. 8. Nymph or pupa. 

 Much enlarged, (After Moultonl 



" The I. ami. It is interesting to watch, with the aid of a strong- 

 lens, a young- thrips issuing- from the egg-. The tiny incision in the 

 stem of a blossom or leaf shows where an egg has been placed, and 

 the enlarging egg within, causing a swelling in the plant tissue, at the 

 summit of which is the incision, indicates that the insect is about 

 ready to emerg-e. The first sign of life is the appearance, pushing out 

 from the incision, of the head, with its bright red eyes. Little by 

 little, and swaying backward and forward, the larva forces itself 

 out until about one-half of the body is exposed, when first the antennae, 



c 



