INSECTS AFFECTING PARK AND WOODLAND TREES 339 



Large bark and wood borers, sawyers and their associates 

 Large, white, flcsliy, legless grubs from about ' _■ to 1 ' _• inches long, may be frequently 

 found working in the inner bark and sapwood of dead and dying jiines, sjiruces, 

 balsams and also in cut logs from these trees, ])rodu( e the following : 

 A magnificent grayish beetle finely mottled with light brown and ranging in length 



from ^ to I J2 inches Sawyer, M on o h a m m u s c o n f u s o r, ]>. 360 



A uniformly black beetle mottled with white and with a white scutelhim, about fs 



inch in length . . White spotted sawyer, M o n o h a m m u s s c u t e 1 1 a t u s, p. 364 



A brownish, mottled, cylindric beetle about yi inch in length and with very long, 



slender antennae Tickler, iM o n o h a m m u s t i t i 1 1 a t o r, ]i. 365 



A large beetle about yi inch long, with light grayish wing covers mottled with brown 



and dark sjjots Marbled sawyer, N[ o n o h a m m u s mar m o r a t u s. p. 366 



Smaller white grubs working in decaying bark, never entering the wood. 



A white, broad headed, llattened grub oc< urs in considerable nundiers on the bark of 

 dead pines, transforming to a gray, black marked beetle with conspicuous ridges 



on its wing covers Ribbed pine borer, R h a g i u m li n e a t u m, p. 366 



A smaller, less flattened grub jiroducing a small beetle with a black head and thin, 



dark bluish wing covers P y t h o a m e r i c a n u s, ji, 368 



Flattened, white or yellowish spotted beetles about -;8 inch in length, occur on spruce and 

 hemlock in July, and are the parents of a destructive flat headed borer 



Sjjotted buprestid, Nf e 1 a n o p h i I a f u 1 v o g u 1 1 a t a, p. 390 



Smaller wood borers 

 A rather stout, brownish black beetle about '3 inch long, attacks exposed wood of various 



coniferous treees Spruce timber beetle, X y 1 o t e r u s b i v i t l a t u s, p. 369 



A brownish black, rather slender beetle about '3 inch long, enters the sa|)wood of dying 

 and dead white ])ine, making cylindric galleries, with black stained walls. 



Eastern pine wood stainer, ('. n a t h o t r i c h u s m a t e r i a r i u s, ji. 37 i 

 Small bark and wood borers working in the inner bark and outer sapwood and forming 

 rather irregular galleries in dead limbs 



Pi t y o ph t h o r u s and P i t y o g e n e s (several species of eacii), p. 372-375 



Twig borers 

 An oblong, oval weevil about j{ inch long, freipiently deposits eggs in the leading shoots 

 of pine or other evergreen trees. The grul)s work in the shoots and kill them, causing 

 an irregular, deformed tree of little commercial value 



White i>ine weevil, Pissodes strobi, p. 397 



