a 459 



Willow, insects injurious to: 

 leaf feeders : 



bag or basket worm, 12^''. 



black walnut caterpillar, jOj*. 



buck niotl-, 311". 



Cottonwood leaf beetle, 258', 317**. 



elm caterpillar, spiny, ids'*, 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, 227''. 

 Willow, European, cottonwood leaf beetle 



on, 318'. 

 \\'illow borer, mottled, 8", 51^, 100^-3*. 

 Willow shoot sawfly, 258-, 302^-3". 

 Willow slug, yellow spotted, 258*, ^22-- 



248. 

 Winthemia 4-pustulata, 132*, 138^. 

 Wood borers. 7^, 11*, 35®, 256-'-S7*. 

 long-horned, /*. 



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

 287^ ; activity, 29- ; common and scien- 

 tific names, 28". 



downy, 61'. 

 Woolly elm bark aphid, 172", 192*. 

 Woolly elm leaf aphid, 177^-78". 

 Woolly larch aphid, 172', i87«-88». 

 Wren, ^2^. 



golden-crested, 191*. 



house, 26*. 



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



grotei, 130', 130", 131^, I3r''. 



laticinerea, 130', 130*, 131', 131*. 

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



politus, 257*', 292^-93*. 

 Xylotrechus colonus, 256-'', 259--61''. 



Yellow bird, iii^. 



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



Yellow striped oak caterpillar, 258'', 306*- 



10^. 

 Yellowthroat, Maryland, 26', 27^. 



Zeuzera pyrina, 8-, 45", 49, 51^, 7S^-79*- 



