the various conditions tlii-oiisrhoiit the countiy, and lias tlnis a Jiiorc 

 restricted distribution. 



LIFE HISTORY AXD HABITS. 



The scurf}" scale, Uke the oyster-shell scale, winters in the egg 

 condition under the scales. The number which may be deposited 



Fig. 2.— The scurfy scale ( Chionaspis furfura). Male at right, female at left. All enlarged. (Original.) 



by a given female, as may be easily verified by examination, varies 

 considerably. The following records show the number of eggs from 

 each of twenty individuals : 



Number of eggs deposited by the scurfy scale. (Material collected on apple sprouts from 

 base of apple stump March 31, 1905, at Arlington Farm, Virginia.) 



Average number of eggs per scale, 57.5. 

 36826— Cir. 121—10 2 



