76 SHADE TREES. 



to distinguish them from the tent caterpillars in apple 

 orchards which are most conspicuous in spring. Linden or 

 basswood among the shade trees suffers most from this web- 

 worm which, however, may be found on a great variety of 

 deciduous trees. 



Remedial Measures. 



When a forming nest of these caterpillars is observed burn 

 it with a long handled torch, cut it off and tramp it under 

 foot or otherwise destroy it. When the nests are not ac- 

 Destroy cessible or have become so large that cutting 



nests. would mutilate the tree, spray the foliage 



around the nests with Paris green or arsenate of lead as 

 recommended for the elm-leaf beetle. It is not necessary to 

 spray the entire tree, for the caterpillars do not move further 

 from their nest than necessary to find food; hence spraying 

 the vicinitv of the nest is all that is needed. 



THE MAPLE PSEUDOCOCCUS. 



Late in the summer the trunks, and sometimes the 

 branches, of sugar maples become covered with a white cot- 

 tony or waxy substance, beneath which will be found yel- 

 lowish, crawling, grub-like creatures. These sometimes in- 

 Attacks crease so greatly in number that they form ver- 



ssar i table layers, coating the trunks completely and 



maples only. J J 



extending to the leaves. When the latter are 

 attacked they are apt to turn yellow and drop, so that in 

 severe eases a tree becomes partly defoliated earlier in the 

 season than is normal. The insect winters in the partly 

 grown condition, hiding in the crevices of the bark, and not 

 until after mid-summer does it usually become abundant 

 enough to attract attention. 



