326 NEW YORK STATE MUSEUM 



The full grown larva is a trifle over 34 inch long, with the head, 

 thoracic shield, true legs and anal shield, coal black, and the remainder of 

 the body a yellowish white. The segmentation is very distinctly marked 

 and the abdominal segments bear conspicuous lateral tubercles, those on 

 the second to the seventh are tipped with black and bear a black chitinous 

 point. The brown spiracles are circular. 



The egg of this species has been described by Mr Chittenden as short, 

 oval in outline and flattened on two sides. He states that its color when 

 freshly laid is milky white and that the shell is extremly thin, pliable, and 

 with a very fine netlike sculpture, visible only with a strong magnifying 

 glass. 



Life history. The life history of this beetle in West Virginia, has 

 been given by Dr Hopkins, as follows: 



The adults probably appear in May or June and deposit eggs on 

 the under surface of the leaves. The small grubs hatching therefrom 

 burrow in and feed upon the delicate parenchyma, forming blisters near the 

 edges which usually extend to the midrib. They transform within the 

 blister to the pupa and the beetles soon emerge and feed upon the remain- 

 ing unaffected leaves. 



Mr Chittenden states that the beetle makes its first appearance in the 

 vicinity of Washington soon after the leaves of the locust tree have fully 

 developed, usually about the beginning of Ma\', and from then it ma)- be 

 found continuously throughout the summer till the first half of September, 

 it being quite abundant from the first week of July till nearly the middle of 

 August. He states that the beetles of the first spring generation began to 

 cievelop July 7 in 1902 and had transformed for the most part by the 12th. 

 He adds that the beetles are usually seen apparently motionless on the 

 surface of the leaves but close inspection will show that they are feeding. 

 Early in the season the adults eat small oblong holes in the leaves, but 

 later the lower half is left intact and the upper portion finely skeletonized. 

 The injury done by the beetles, even when they are very numerous, is 

 trifling when compared with the work of the larvae. Mr Chittenden states 

 that during rainy weather, at night time and while ovipositing the beetles 



