INSECTS AFFECTING PARK AND WOODLAND TREES 429 



A largo, l)r()\vnisli, vellDW-inarkcd ami ycllow-haiuU-tl, ( Icarwing motli willi a wing s|)rfad 



of lyi incht's, bores as a larva in ash M l- ni y t h r u s a s i I i j) e n n i s, ]>. 464 



A sawfly larva boi-es in the ])artly decayed wood of standing hire h and makes a gallery 



about J8 inch in diameter X y p h i d r i a |) r o v a n c h e r i, |>. 465 



A horntail borer making moderately large, cylindrii- burrows in decaying birch 



Slender birch horntail, Konowia a t t e n 11 a t a, p. 466 

 A flattened, brilliantly cohjred, purplisii or bluish beetle about J4 inch long, occurs 



in May on bir( h and other deciduous trees C h r y s o b o t h r i s azure a, p. 467 



A slender, brownish beetle ranging from about -'4 to nearly i '4 inches in length, bores in 



the larval stage under the bark of yellow birch and nia|:le 



I! e I I a m i r a s c a 1 a r i s, p. 467 

 A brownish, white-striped caterpiller about i inc h long, bores commonly in herbaceous 



stalks and the more tender twigs of maple and ash 



Stalk l)orer, I' a ]> a i p e m a n i t e 1 a, p. 468 

 A lirownish, cvlindric beetle works in the stumps of receiitlv cut yellow birch, causing an 



excretion of sap, whii h gums the rust-colored Ijorings to the outside of the affected 



wood P)irch bark borer, I) r y o c o e t e s sp. ]). 468 



A small, black beetle with gray or yellowish gray vestiture, is sometimes bred from willow 



S a p e r d a m u t i c a, p. 469 

 A blue black, clearwing moth having a wing s])read of '/% inch, bores in willow in the 



larval stage S e s i a a 1 b i c o r n i s, p. 469 



A steel blue, clearwing moth with a broad abdominal band and the fore wing tips red, 



bores willow < anes in the larval stage S e s i a b o 1 I e r i, p. 470 



A black, clearwing moth with three conspicuous yellow abdominal bands, lives in the 



larva! stage in Sa])erda galls on willow and ])0|)lar 



Three banded clearwing, M e m v t h r u s t r i c i n c t u s, p. 47 i 

 A large, brown, yellow-marked, clearwing moth having a wing S|)read of i ;'4 inches, lives 



as a larva in willow and poplar trunks A c g e r i a tibialis, p. 472 



A large, brown and yellow-marked, clearwing moth having a wingsjjread of i ?4 inches, 



lives as a larva in roots of willow and jjoplar A c g e r i a a ]i i f o r m i s, p. 472 



A rather stout, blackish beetle irregularly marked with gray, occurs in June on poplar and 



hickory A c a n t h o d e r e s d e c i p i e n s, p. 473 



Girdling the trunks (jf sapling po|>lars or running a mine around them, causing a swelling 



twice the diannti-r of the tnv, ,1 1 vlindric, slaty gray beetle about -'a inch long 



S a |) e r d a c o n c o 1 o r, ]i. 4 7 4 

 A small, brown or black, coarsely punctured beetle about -^8 inch long, may be bred from 



galls of balsam poplar S a j) e r d a j) o |) u 1 n e a, p. 474 



