INSECTS AFFECTING PARK AND WOODLAND TREES 475 



Life history. The beetles occur abroad in June and larvae have also 

 been met with the same month. Its borings cause galls in balm of Gilead 

 branches, the larvae occasionally being very abundant and in some instances 

 not more than an inch or two apart and located chiefly at the base of the 

 buds, where their presence is indicated by a swelling in the branch sur- 

 mounted by a brown patch of partly decayed bark. The larva makes an 

 excavation more than an inch long, much of which is filled with debris. 



Bibliography 



1904 Felt, E. P. & Joutel, L. H. N. Y. State Mus. Bui. 74, p. 68-73 



Dorytomus parvicollis Casey 



A small, brownish black, yellowish specked weevil about )\ inch long, occurs in 

 early spring under poplar bark. 



This snout beetle was very abundant under the loose bark of poplars 

 at Karner, up to the middle of May 1902. The insects evidently sought 

 this retreat for shelter, because there were no evidences of borings in their 

 immediate vicinity. The beak is moderately long in the male, longer 

 in the female ; the thorax is rounded, rather coarsely punctured ; the elytral 

 striae are coarsely punctured, and the wing covers are clothed with a some- 

 what sparse golden pubescence, frequently present in bunches here and 

 there, giving a spotted appearance. This species has been recorded from 

 Indiana. 



Dorytomus vagenotatus Casey 



A small snout beetle about )/% inch long, irregularly clothed with grayish pubescence 

 occurs under poplar bark in early May. 



This species is much smaller than the preceding, and apparently cor- 

 respondingly scarce, since only four specimens were taken as compared 

 with over one hundred of the former species. This differs from the first not 

 only in size but in the finer sculpturing of the prothorax and the smaller dots 

 of the wing covers, which latter are partially clothed with a grayish instead 

 of golden pubescence. This species was described from Indiana. 



