INSECTS AFFECTING PARK AND WOODLAND TREES 6 1 



Natural enemies. Mr F. H. Mosher, as stated hy Mr Kirkland, records 

 the downy woodpecker, the blue jay and the chickadee as preying on this 

 borer. Mr Kirkland adds to this Hst a spider, T h e r i d i u m t e p i d a r i o- 

 ru m C. Koch, which he found feeding on the beetles. 



Food plants. This twig pruner not only attacks maple and oak, two of 

 its favorite food plants, but has also been recorded from a number of others. 

 A few of the more important are: apple, pear, plum, peach, grape, quince, 

 orange, osage orange, hickory, chestnut, locust, sassafras and sumac. 



Remedies. The fallen branches usually contain the larva and should 

 therefore be collected and burned sometime during the winter. 



Bibliography 

 189J Lintner, J. A. Ins. N. Y. 9th Rep't, p. 357-61 



189S Chittenden, F. H. U. S. Dep't Agric Div. Ent. Bui. 18, n. s. p. 35-37 

 189S Felt, E. P. Fish, For. and Game Com. X. Y. 4th Rep't \>. 392-93 



Pigeon tremex 

 Trciuex colimiba Linn. 



A number of round holes, the size of a medium lead pencil, in the diseased trunk of 

 maple, elm and other trees are tiuite characteristic of this insect's presence. The large 

 grub works near the center of the trunk and may be recognized by its prominent spine "on 

 the posterior extremity. 



This interesting insect attacks a number of forest and shade trees, but 

 so far as observed, its operations are confined almost entirely to diseased or 

 dying trees. It is a very common insect in or about Albany where it breeds 

 in the elms which have been weakened by successive attacks of the elm leaf 

 beetle, Galerucella luteola Miill., and it also occurs in many sugar 

 maples which have been seriously injured by the sugar maple borer, 

 P 1 a g i o n o t u s s p e c i o s u s Sa}-. 



Description. The pigeon treme.x is a magnificent four-wingctl [\\ about 

 2 inches long, a wing spread of 21% inches and with a prominent horn at the 

 extremity of the abdomen. This latter appendage give rise to the common 

 name of horn tail, which is frequently applied to this insect and its allies. 

 This species may be recognized b\- its cylindric dark brown abdomen with 



