THE OLIVE 



115 



inch. The cocoon which envelops the pupa is composed of silky 

 filaments so finely woven as to be transparent. 



The moth (Fig. 10, 10-1, 10 a, 10 b,) has a rounded head cover- 

 ed with narrow scales. Antenna? wiry, with globular joints. Upper 

 edge of upper wings fringed with soft hair, lower edge bare. Low- 

 er wings shorter than upper, and fringed all around with hair which 

 is longer on the upper than on the lower edge. Half way the length 

 of the posterior tibia, are two long spurs. Body, antenna? and feet, cov- 

 ered with ashy gray scales. Upper wings a whitish ash color, with 

 a silvery gloss, with a disk-shaped black spot midway the wing, near 

 the lower ed°:e, and another less marked near lower outside corner. 

 The remainder of the wing is dotted with very minute black specks, 

 irregularly placed. The lower wings of a uniform dark ash color. 

 Length, a quarter of an inch, with the wings folded, nearly half an 

 inch with the wings spread. The foregoing is a description of the 

 moth in its tpyical condition and in a state of perfect preservation. 

 The upper wings sometimes vary in the number and size of the 

 spots. 



There are three generations of the moth. 



First: The winter generation, which draw their nourishment from 

 the leaves and tender buds. 



Second : The spring generation, which devours the germ of the 

 blossom even before it opens. 



Third: The summer generation, which attacks only the kernel of 

 the seed. 



In February the eggs of the first generation are seen on the under 

 part of the leaf (Fig. 1 a a,), In the last days of that month the 

 larva hatches and commences to consume the foliage (Fig. 1 b. ) mak- 

 ing galleries under the epidermis of the leaf which takes the color 

 of the dry leaf and becomes transparent. Later on, this gallery is 

 burst by the young grub, which continues to prey upon the leaves. 

 (Fig. 1 c.) enveloping itself in silken threads, as a screen against 

 external agents. Some larva? consume the entire web of the leaf 



