330 EEPORT OF THE SECRETARY OF THE 



[FiGURK S.] 



1 O/ 



Apple Curculio— (a) pupa ; (6) larva. 



It differs so remarkably from that of the Plum Curculio 

 that the two insects can be distinguished at a glance, even in 

 this masked form. It is softer, the chitinous covering being 

 thinner and much whiter. It cannot stretch straight and travel 

 fast, as can that of the Plum Curculio, but curls round with 

 an arched back, joints 4-7 being larger than the preceding. 

 It is more crinkled, each joint being divided into three princi- 

 pal folds, much as in the common White Grub. The space 

 between the folds is frequently bluish-black, and there is a 

 very distinct, continuous, vascular, dorsal line of a bluish 

 color. It has no bristles like nenu'phar except a few weak ones 

 on the first joint, arising from some ventral tubercles which 

 remind one of feet. The head is yellowish-brown, with the 

 jaws somewhat darker, and the breathing pores, except that in 

 fold of first joint, are not easily seen. , 



IT TRANSFORMS IN THE FRUIT. 



The fruit of the wild crab containing this larva never falls, 

 and the fruit of our cultivated apples seldom; and in this 

 respect the effect of its work differs remarkably from that of 

 the Plum Curculio, or even of the Codling Moth. Why such 

 is the case it would be difficult to explain. It is one of those 

 incomprehensible facts which at every turn confront the 

 student of Nature's works. We might with equal reason ask 

 why it is that of the two stone fruits, the plum and the cherry, 

 the larger falls and perishes and tiie smaller hangs on and 

 lives, when infested with the Plum Curculio ; and of the two 



