SHADE TKEES. 



Remedial Measures. 



On shrubs, and especially Arborvitse and other ever- 

 greens, pick off the bags during the winter and burn them. 

 On trees, where that is not feasible, spray thoroughly with 

 arsenate of lead or Paris green as recommended for the elm- 

 pick off l ea ^ beetle, just as soon as the young caterpillars 

 bnss * are observed issuing from the bags. Conifers 

 will not stand Paris green, but may be safely treated with 

 arsenate of lead. There is only one brood of this species and 

 winter work is especially recommended on hedge plants which 

 are sometimes dense and not easily sprayed. 



THE COTTONY MAPLE SCALE. 

 Plate IV., Figs. 1, 3, 3a. 



Attacks Maples only, among shade trees; but found also 

 on Vitis, Ampelopsis and other plants. The impregnated 

 female winters as a brown scale on the twigs, resumes feeding 

 in May, and late in that month or in early June begins to 

 exude a white cottony mass in which a thousand eggs or 

 Attacks more are laid. The minute young hatch in late 



t"e ! es, m but le June or early July, crawl about a few hours 

 other plants. anc [ |] aeil se ^ on l eav es, twigs and branches and 

 suck the juices. When the insects are abundant, the leaves 

 turn a sickly yellow, often become covered with honey dew, 

 and badly infested branches may die. The insects mature in 

 late August and September; the males issue as minute 2- 

 winged flies, impregnate the female and die. The latter 

 move from leaves to twigs and fix themselves firmly for the 

 winter. 



