a 459 



Willow, insects injurious to: 

 leaf feeders : 



bag or basket worm, 127-. 



black walnut caterpillar. 305''. 



buck moth, 311^. 



Cottonwood leaf beetle, 258", 317*. 



elm caterpillar, spiny, 105*, 158". 



elm sawfly, 105®. 155*. 



forest tent caterpillar, iio". 



tussock moth, white marked, 136^. 



webworm, fall, 142". 



willow slug, yellow spotted, 258*, ^22^. 

 scale insects : 



Chionaspis lintneri, 227®. 



oyster scale, 212''. 



Putnam's scale, 22"/^. 

 \\'illow, European, cottonwood leaf beetle 



on, 318^. 

 Willow borer, mottled. 8", 51', ioo'*-3'*. 

 Willow shoot sawfly, 258-, 302--3'. 

 Willow slug, yellow spotted, 258*, 322-- 



249. 

 Winthemia 4-pustulata. I32^ 138^. 

 Wood borers. 7-', ii'-', 35'', 256^-57*. 

 long-horned, 7*. 



Woodpeckers, 28-, 30^ 54'"', 58^ 85*, 284^, 

 287'* ; activity, 2y- ; common and scien- 

 tific names, 28". 



downy, 61 ^ 

 Woolly elm bark aphid, 172-'. 192*. 

 Woolly elm leaf aphid. i77'-78''. 

 Woolly larch ajdiid. 172", i87«-88». 

 Wren, ;i,2^ . 



golden-crested, 191*. 



house, 26''. 



Xylina antennata, 49, 105^, i29'-32''. 



grotei, 130', 130^ 131*, 131*. 



laticinerea, 130', 130**, I3i\ 131". 

 Xyloterus sp., 257^, 293^-94**. 



politus, 257", 292^-93*. 

 Xylotrechus colonus. 256''. 259--6l^. 



Yellow bird, iii". 



Yellow-spotted willow slug. 258*^. 322^-24'-'. 



"S'ellow striped oak caterpillar, 258*. 306''- 



10^. 

 Yellowthroat, Maryland, 26', 27''. 



Zeuzera pyrina, 8-, 45", 49. 51", 75''-79''. 



