248 THE CANADIAN ENTOMOLOGIST. 



A Maple Twig Borer ( ) was one of the commonest 



shade tree pests in West Virginia during the past spring. It attracted 

 general attention in all parts of the State, and was the cause of extensive 

 correspondence in answer to inquiries. It is the larva of a moth that 

 bores in the tips of the young, growing twigs of all species of Acer. 

 So common was the injury by it that large trees presented the appear- 

 ance, in June, of having suffered from a severe frost. It occurred in all 

 the life zones of the State, from the Upper Austral to the Canadian. It 

 makes its appearance soon after the leaves appear in the spring, and 

 continues operations until about the middle of May, the moth emerging 

 in June. 



Oyster- Shell Bark-Lorne ofi Pennsylvania Maple.— In May, 1896, I 

 observed, while in the Canadian Zone of the State, that some of the 

 small trees, and twigs on other trees of this maple, were out in leaf far in 

 advance of other examples of the same species, the former being in fruit, 

 while the latter had just commenced to flower. This was found to be due 

 to the influence of the Oyster-Shell Bark-Louse, which occurred on all of 

 the early fruiting twigs in great numbers. 



The Locust Leaf Beetle (Odontota dorsalis).—T\i\?, beetle is again 

 common and destructive to the yellow or black locust leaves over the 

 greater part of the State, it being destructive this year in localities which 

 heretofore have been exempt. This beetle has been observed by me 

 feeding on the leaves of white oak, beech, birch, hawthorn, and apple, 

 thus indicating the possibility of its changing its normal habits and be- 

 coming destructive to the foliage of other trees, including the more valu- 

 able fruit trees. 



A Remarkable Lnjiiry to the Leaves of Forest Trees by an U?iknown 

 Lnsect. — Last fall, while collecting in and near the western border of the 

 Transition Life Zone, or what is known as Laurel Hill and Cheat Moun- 

 tain, I observed that the leaves of all kinds of forest trees were literally 

 riddled with holes of various sizes, as if they had been caused by hail when 

 the leaves were young. This condition extended for a distance of four or 

 five miles along the summit of the mountain and down the western slope 

 to what appears to be the line separating the Upper Austral and Transi- 

 tion Life Zones. No trace or evidence could be found at the time to in- 

 dicate what insect was to blame for this remarkable condition. The 

 region has been frequently visited this spring and summer, and while the 



