INSECTS AFFECTING PARK AND WOODLAND TREES 



3/i 



Eastern pine wood stainer 



(TnatJiotrichus materiarius Fitch 



A brownish black, rather slender beetle about }i inch long, enters the sapwood of 

 dying and dead white pine, making cylindric galleries, the walls of which are stained black. 



This common wood-boring Ambrosia beetle lives on a fundus cultivated 

 in its galleries. This species is common in dying and dead white pines in 

 different sections of the State, entering the wood very shortly after the tree 

 has been injured as a rule. It was met with on spruce at Big Moose 

 N. Y., July 2, 1903, it being attracted to trees injured by recent fires in that 



section. It has also been noticed by Dr Fitch. This insect makes slender, 

 cylindric burrows across the wood fibers and usually parallel with the lines 

 of growth. Short, straight, lateral galleries or brood cells branch off from 

 the main ones at right angles above and below. This species is attracted 

 by the odor of turpentine, and Dr Hopkins records it as one of a number 

 collected on a recently painted greenhouse. He states that this species, 

 associated with others, is frequently found in the sapwood of spruce at 

 W illiams River W. Ya., and adds that it is very common in that state in 

 the sapwood of dead and dying pine and spruce trees, logs and stumps. He 



