INSECTS AFFECTING PARK AND WOODLAND TREES 48 1 



destroyed by an unknown Tachinid parasite and another small dipterous 

 larva is sometimes found feeding in considerable numbers on the larva or 

 pupa. 



Bibliography 



1904 Felt, E. P. & Joutel, L. H. N. Y. State Mus. Bui. 74, p. 18-20 



Liopus alpha Say 



A small, legless grub boring irregularly in dead sumac and other twigs, may be the 

 young of this beetle. 



This species occurs rather abundantly in dead sumac twigs at Clinton 

 Heights. The infested twigs were gathered and many of the beetles bred 

 therefrom the latter part of May. 



The beetle is about inch long, rather stout, and remarkable for the 

 long, delicate antennae, which have the enlarged distal portion of each 

 joint dark brown or nearly black. It is rather prettily 

 marked with silvery gray, light and dark brown, the 

 irregular oblique stripe just behind the middle of 

 each wing cover being the most conspicuous, the two 

 forming a V with its point toward the head. Accord- 

 ding to Messrs Leng and Hamilton, this species is 

 quite variable and difficult to separate from allied 

 forms. They describe five variations in markings 

 and state that it may be separated from its ally, 

 L. c i n e r e u s Lee, by the finely punctured surface, 

 behind the band almost impunctured. iar g ed (original) 



The full grown larvae are about y 2 inch long, and present no unusual 

 characters. Unfortunately specimens were not preserved and a detailed 

 description is impossible. 



The working of this larva is limited very largely to the central portion 

 of the twig, and the gallery of one borer may have a length of 2 or 3 

 inches. The exit hole is oval and a little over inch in diameter. 



Distribution. Say states that this species is not rare in Pennsylvania 

 and that he has obtained it from the Northwest Territory, and LeConte 



