ATTACKING THE LEAVES. 121 



full grown, which is usually during the month of July, is 

 about one-fifth of an inch long, oblong in form, rather 

 broader before than behind, flattened, soft, and of a yellowish- 

 white color, with the head and neck blackish and of a horny 

 consistence. Each of the three anterior segments has a pair 

 of legs; the other segments are provided with small fleshy 

 warts at the sides, and transverse rows of little rasp-like 

 points above and beneath. 



The caterpillar changes to a chrysalis within the leaf, from 

 which, in about a week, the perfect insect escapes. Within 

 these blister-like spots the larva, pupa, or freshly-transformed 

 beetle may. often be found. This insect never occurs in suf- 

 ficient numbers to be a source of much trouble. 



No. bQ, — The Cloaked Chrysomela. 



Glyptoscelis crypticus (Say). 



This is another beetle which devours the foliage of the 

 apple-tree, also that of the oak-tree. It is of a thick, cylin- 

 drical form, about one-third of an inch long, with its head 

 sunk into the thorax, and the thorax narrower than 

 the body. It is of a pale ash-gray color, from being ^^^' 121. 

 entirely covered with short whitish hairs. The 

 closed wing-covers have a small notch at the top of 

 their suture. At the junction of the wing-covers with 

 the thorax there is a dusky spot. This insect is 

 represented in Fig. 121. 



No. 57. — The Apple-tree Aphis. 



Aphis mail Fabr. 



During the winter there may often be found in the crevices 

 and cracks of the bark of the twigs of the apple-tree, and 

 also about the base of the buds, a number of very minute, 

 oval, shining black eggs. These are the eggs of the apple- 

 tree aphis, known also as the apple-leaf aphis, Aphis mali- 

 folise Fitch. They are deposited in the autumn, and when 



