THE CANADIAN ENTOMOLOGIST. 



97 



period of the year is so rapid, and the sap circulates through the branches 

 in such abundance, that the comparatively small quantity consumed by 

 these plant lice seems scarcely to be missed. In a few days the young 

 leaves expand, when the insects are distributed over the foliage, and 

 usually attract no further notice. 



All the lice hatche.d in the spring are females, and they reach maturity 

 in ten or twelve days, when they commence to give birtli to living young, 

 producing about two each every day for two or three weeks, after which 

 the older ones die. The young locate about their parents and mature in 



ten or twelve days, when they also 

 l)ecome mothers as prolific as 

 their predecessors. As the sea- 

 son advances some of the females 

 acquire wings, by means of which 

 they fly to other trees, where they 

 found new colonies. In figure 5 

 both winged and wingless speci- 

 mens are shown much. magnified. 

 Late in the autumn males, as 

 well as females, are produced, 

 and the work of the year closes with the deposit of eggs as already 

 described. Were it not for the activity of Lady-birds and other useful 

 predaceous insects, which appear early upon the scene and devour multi- 

 tudes of these lice, they would soon swarm on every leaf of our apple 

 trees and become a source of serious trouble. 



Fis. 5. 



NOTES OX THE EARLY STAGES OF CALOPTERON 

 RETICULATUM, Fabr. 



BY D. W. COQUILLETT, WOODSTOCK, ILL. 



On the loth of July I found a pupa of this species suspended by the 

 hind end of its body beneath a log. The larval skin was rent and worked 

 backward, but still retained nearly its original shape and color, and by 

 comparing it with certain larvae which I have frequently met with in 

 similar situations, there is no doubt in my mind but that these latter belong 

 to the above species. 



These larvae very closely resemble that figured by Packard on page 

 465 of his " Guide " (fig. 432), which in the te.xt on the succeeding page 

 is referred to Photuris. The dried specimens now before me measure 



