183 



(Fig. 69.) 

 Adult female before development of eggs: in), ventral view, .showing very long sucking 

 setje : {b), anal plate, showing oharaetoristie ornamentation of edgt. — greatly 

 enlarged. 



(L. (). Jliiininl and C. L. Muilutt. HiiUcliil Xo. .!. .Yric Krrics. Diiinioii of 

 Kntnmoloc/i/, V. S. Dcpartutcnt of Af/rirtilttirc.) 



On liaill.v inlcstcil plants tlu' ,v<mu,:i si-ales scttlr wliiTever tlici'i' is rooni to 

 insert a liculc into the bark, and as thc.r increase in size tlie.v l)er(iine murli 

 crdwileil and civerlapiied and liave tlie ajipearance nf a gra.v. scurfy depiisit 

 (111 the bark. The natural culoiir of the bark is obscureil and the infested phint 

 appears as though coated with flue ash-coloured bran. If the thuiuh-uall or 

 other ob.iect is rubbed over this scurfy coveriu.i;. thereby crushiuj; the insects 

 beneath the scales, a moist or oil.v appearance is produced and numerous scales 

 will be overturned and many of the little yellow insects l)e revealed. 



During the early stagi-s of .an attack, very few. if any, of the scab's 

 will settle uiion the leaves or fruit. Later both may be attacked. Upon the 

 leaves especially of the prune and peach, the youns scales may be found on 

 both surfaces, and more particularl.v clustered along the midrib. Each scaU' 

 produces a nuuute purple siKit. I'lion lairple jiruues. red apples, etc.. the 

 .scales appear only as nnuute gray s]iiM-ks. usually clustered about the cavities 

 at either end : liut upon the yelb)W fruits, like pears, peaches, and the yellow 



