374 



NEW YORK STATE MUSEUM 



The adult burrows, in the smaller limbs just beneath the bark, are 

 usually nearly parallel with the grain of the wood and may extend a 

 distance of 3 or more inches. The irregular, serpentine burrows of the 

 young are ^ inch or more apart, over ^ inch long and usually alternating 

 on each side of the parental gallery. 



Pityogenes sp. a 



Another species of this genus, stated by Dr 

 Hopkins to be a new form, was met with by the writer 

 at Saranac Inn in August 1900. It was working in 

 a nearly dead young pine and its galleries are quite 

 different from the followingf. The central chamber is 

 not quite so large, the egg notches appear to be placed 

 closer together, and the larval galleries do not groove 

 the wood so deeply as a rule. The pupal cells are 

 sunken much more deeply into the sapwood. Figure 

 79 illustrates the work of this species. Apparently 

 the same insect was met with in another white pine 

 where it was associated with Tomicus caelatus 

 Lee, and also in balsam, where it occurred in company 

 Fip. 79. work of Pity ogenes with the last named species and Tomicus b a 1- 



sp. a in white pine (original) 



s a m e u s Lec. This latter tree was dying and had 

 been abundantly infested by the bark borers. 



Pityogenes sp. b 



A small beetle, a little over > £ a inch in length, works in the bark of dead white pine 

 limbs. The prothorax is dark brown, rather coarsely tuberculate, while the wing covers 

 are a lighter brown, nearly smooth, and with two or three minute tubercles on the 

 declivity of each. 



This species was met with by the writer Aug. 5, 1900, at Slingerlands 

 N. Y., where it was working on pine limbs which had evidently been 

 recently cut. Larvae and pupae were present and the insect had begun 

 operations only a little while before. Tomicus caco graph us Lec. 

 was associated with this borer and also a species of Hypophloeus. This 



