INSECTS AFFECTING PARK AND WOODLAND TREES 



673 



Dryocoetes sp. 

 A species belongini,^ to tliis j^^fnus was met with liy the writer Aug. 14, 

 1900, at Saranac Inn, when' it was breeding under spruce bark in company 

 with the spruce barlv borer. PoN^graphus rufijx-nnis Kirby. The 

 Ijcetle is about 3/32 inch long, and in tlie case of the specimen obtained, of a 

 yellowish brown color. It is doubtless much darker in mature individuals 

 and its galleries are larger than those of Polygraphus. 



Cryphalus striatulus Mann. 

 \ small, yellowish brown to almost black bark beetle occurs in spruce bark, working 

 jKirticuiarly at the base of limbs. 



This species was taken 1)\- us, working in sjjruce bark in association 

 with Tomicus balsa mens Lee. The affected tree was near water 

 and was noticeable because of its red foliage. The 

 inuik was not injured though this borer was work- 

 ing in some ninnbers at the base of the limbs and r\W 

 appeared to be the primary cause of the trouble. This 

 species was taken in .August, working at the base of a 

 small hemlock limb, the foliage of which had begun to fir. 100 Middle tihiac: ,. cry- 



1> h a I u s striatulus; ^— Pily- 



turn brown. It was also observed at work in a small ophthorus minutissimns; 



f-'P. p tl b c r u 1 u s; ^— P h I oco- 



balsam tree, which had been cut several months. .rii.us frontalis (..riKitiai) 



The adidt is a light yellowish brown to almost black beetle about 3/32 

 inch long. The prothorax bears a number of prominent chitinous tubercles 

 and the wing covers are faintly striated with rows of tnie punctures. The 

 galleries of this species are very irregular and appear to have no plan, 

 consisting, as they do, of a series of interlacing burrows, which often unite 

 to form large excavations around the base of a twig. 



