Ninth Report of the State Entomologist 427 



and destroying the larvte that are taken out of the limbs that had 

 broken off as the result of their burrowing. After every high wind, 

 wagon loads of branches were gathered from the ground and burned. 

 It was being corabatted by every possible means, not only by burning 

 the falling limbs, but by removing from the trees those that from their 

 changing color or withering gave indications of infestation, and also, in 

 case of the rarer trees, searching for an opening to burrows and 

 injecting therein the powerful insecticide, bisulphide of carbon. 



The same year it had extended its operations all over the city of 

 Brooklyn — not an avenue or street therein but gave abundant evidence 

 of its presence. It had also spread, according to Mr. Pike {lo<\ cif.), to 

 Astoria, New Rochelle, Jamaica, New Lots, and Flatbush, on Long 

 Island. 



The injuries caused by this boi'erare quite serious. In young maples 

 it attacks the trunk near the ground, as already stated, and so weakens 

 it with its large burrows running around the tree as to cause it to break 

 with the wind and fall to the ground. In the elms, different species of 

 which it attacks, its operations, so far as observed, are confined to the 

 limbs and branches, which are so weakened by the burrows of often a 

 half -inch or more in breadth that they fall from their own weight or 

 even with a moderate wind — the branches thus broken ranging from 

 a half-inch in diameter to more than five inches. 



Already many of the larger elms in Central Park have bad their 

 symmetry and natural beaut}' greatly impaired through this Zeuzera 

 attack. We are not told that any have been killed, but such a result 

 might follow shoidd the insect become sufficiently numerous to invade 

 the entire tree. 



We do not know that any better methods can be used to arrest this 

 increase than those that are employed at the present at Central Park, 

 "unless some means may be devised for destroying the eggs of the moth 

 before the hatchirg of the larva? and their entrance into tlie tree. 



An Elm Tree Bark-borer. 

 The preceding attack, as 3'et, is quite local in our State yet destined, 

 we fear, not long to continue so. Throughout the entire State, and 

 beyond its limits, the beautiful white elm, .17 Imus Americana, which has 

 been so liberally planted and so highly prized as our most valuable 

 shade tree, is suffering from the ravages of a hidden and insidious 

 enemy, and dying one by one from a cause, not apparent, and known 

 to but a few. This is chargeable to the operations of one of our longi- 

 corn beetles, named 8aperda trldentata Olivier, the larv;^ or grubs of 

 which work in the inner bark and sap-wood of the trunk — the attack 



