56 



The Woolly Bark Louse jof the Pine. 



This is an insect which, in some localities, is very destructive to the white pine. 

 Large patches are frequently found on the trunk and branches covered with a white, 



cottony secretion, under the protection of which live myriads of tiny 

 lice. These puncture the bark with their sharp beaks and feed upon 

 the sap, thus exhausting the trees, and sometimes 

 causing their death. Large numbers of these lice 

 are destroyed by lady-birds, who feed on them 

 both in the larval and perfect state. Two species 

 are especially useful in this instance. One is 

 shown in fig. 24, where it is represented in its 

 This is known as the painted lady- bird {Harmonia incta); the other is 



Fig. 24. 

 three stages. 



black, with two red spots, and is called the twice-stabbed lady-bird {Ghilochorus hivul- 

 aerus). The larva is shown in fig. 25. 



Pine Leap Scale Insect — Chronaspis pinifolicn. 



Another allied species is the pine-leaf scale insect (Chionaspis pinifolice, Fitch). 

 The leaves of the pine are sometimes found to be covered with innumerable elongate, 

 snowy-white bodies, which, on examination, are found to be the scales of an insect ; 

 these when abundant give to the whole foliage a whitened appearance, and, if the insects 

 are allowed to pursue their course unchecked, the leaves shortly become yellow or brown, 

 and the trees languish and occasionally die. In fig. 26 is shown a tuft of leaves injured 



aDCiL 



Fig. 26. 



by this scale insect. The scale of the female, sliown at 2c, is about one-tenth of an inch 

 long, that of the male, shown partly grown at 'id and mature at 26, is not more than 

 one-thirtieth of an inch. Both male and female scales are much magnified in the 

 figure. This insect has not yet proved troublesome in forests, but has chiefly affected 

 trees in cultivation. It very closely resembles a species found on cultivated pines in 

 Europe, and may possibly prove to be the same. The eggs are produced under the female 



