65O NEW YORK STATE MUSEUM 



A somewhat cylindric, black or brownish beetle about ^2 inch long occurs in midsummer 



on spruce Tetropium c i n n a m o p t e r u m, p. 669 



A black, red-shouldered, flattened beetle about 5 /,6 inch long occurs on spruce 



P h y m a t o d e s dimidiat u s, p. 669 



A large, handsome, black beetle with the basal portion of the wing covers deep red and 



the middle antennal joints broadly ringed with reddish 



Canadian Leptura, L e p t u r a canadensis, p. 670 



A cylindric brownish beetle about }4 inch long and ornamented with irregular, sulfur 



yellow bands, occurs on hemlock and spruce . . Xylotfechus u n d u 1 a tu s, p. 671 



1 



A slender, whitish, wood-boring grub enters the wounds of living trees and bores deep 

 into the sapwood and heartwood 



Blazed tree borer, Serropalpus barbatus, p. 671 

 A small, narrow, triangular beetle about 3/ l6 inch long and irregularly marked with silvery 



white, occurs on spruce and decaying maple Mordella bo re a lis, p. 672 



A small, stout, nearly cylindric, brownish bark beetle about ]A inch long occurs in spruce 



bark Dryocoetes autographus, p. 672 



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



at the base of the limbs Cryphalus s t r i a t u 1 u s, p. 673 



A minute, black or brown bark beetle excavates many short, radiating, curved galleries in 

 young dying red and black spruce 



Spruce wood engraver, Pityophthorus cariniceps, p. 674 

 Balsam, species affecting 

 A large, metallic, flattened, oval beetle about ^ inch long occurs on balsam in July 



Buprestis maculiventris, p. 674 

 Hemlock, species affecting 

 A rather slender, somewhat triangular beetle with a subtriangular spot near the middle of 

 the outer margin of each wing cover, occurs on hemlock 



Leptura s u b h a m a t a, p. 675 



Cedar, species affecting 



A brownish beetle from 3/% to nearly */z inch long with two large, blue patches at the base 

 of the wing, bores as a larva in cedar 



Cedar tree borer, Hylotrupes ligneus, p. 675 



Leaf feeders 



Pine, species affecting 



Loose web nests thickly sprinkled with excrement, occur on the terminal twigs and contain 

 greenish or brownish false caterpillars. .. False pine webworm, Lyda species, p. 676 



