14: NEW YOEK STATE MUSEITM 



seen European elms badlv defoliated and witliin 50 feet others of 

 the same species would be hardly affected. In the past three 

 years the insect made its way along certain rows of European 

 elms in Albany at the rate of about a block a year. 



Fig. 2. — Leaf showing holes eaten by elm -leaf beetle 



The larvae are very rarely found on the upper part of the leaf, 

 but they occur on the under surface of the leaves and feed there 

 almost exclusively. It is also evident that in most cases the 

 trees are attacked- near the top, probably because the foliage of 

 the upper portion of the trees is more tender and clean. This 

 is well shown on plate 2, where the dead tips are high, showing 

 conclusively the preference the beetles have for the younger 

 leaves. 



After attaining their growth, the larvae forsake the leaves and 

 may be found crawling along the limbs and trunk. If the tree 

 has comparatively smooth bark, a far greater portion make their 

 way to the ground, in search of proper shelter while passing 

 through the pupa stage, than if a rough bark, which affords 



