INSECTS AFFECTING PARK AND WOOD.LAND TREES 



673 



Dryocoetes sp. 

 A species belongliiif to this genus was met with by the writer Aug. 14, 

 igoo, at Saranac Inn, where it was breeding under spruce bark in company 

 with the spruce bark borer, P o 1 \' g r a p h u s r u f i p e n n i s Kirbj'. The 

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

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

 and its galleries are larger than those of Polygraphus. 



Cryphalus striatulus Mann. 



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



particularly at the base of limbs. 



This species was taken by us, working in spruce bark in association 



with T o m i c u s b a 1 s a m e u s Lee. The affected tree was near water 



and was noticeable because of its red foliage. The 



trunk was not injured though this borer was work- 



ino; in some numbers at the base of the limbs and Vi^I 



appeared to be the primary cause of the trouble. This l^ijj 



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



small hemlock limb, the foliage of which had begun to Fig. 200 Middle tibiae: ,- cry- 

 , . Ill 1 • II phaius stri.•it«lus;/»=Pily- 



turn brown. It was also observed at work m a small ophthorus minutissimus; 



, , 1- , , ,1 1 , r_P.puberuIus;rf=PhIoeo- 



balsam tree, which had been cut several months. _ tritus frontalis (original) 



The adult 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 fine 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 larg-e e.xcavations around the base of a twie. 



