450 Report of the Entomologists of the 



tered about promiscuously on both surfaces of the leaves, and it is 

 not unusual to find some that have remained behind on the new 

 and tender twigs. When attacking the leaves of the quince, they 

 seem to prefer the upper surface, for out of a large number of 

 quince leaves examined only an occasional scale could be found 

 on the under surfaces, while the upper surfaces were moderately 

 infested. It should be remembered that these young scales are 

 very small at this time, and as they closely resemble the leaf in 

 color and are almost semi-transparent, they are easily overlooked. 

 Hence in examining the leaves for them it is well to use a small 

 magnifying glass. 



The scales grow slowly during the summer and gradually 

 change to a dark, reddish brown color. During all of this time, 

 however, they suck the sap vigorously and secrete much honey 

 dew, causing the leaves, branches and fruit to become sticky and 

 unsightly. 



During the latter part of August or early in September the 

 young scales migrate to the twigs and branches and even the 

 trunk to seek shelter for the winter. On badly infested trees they 

 may frequently be found overlapping one another and in sheltered 

 places, as in crevices in the bark, it is not unusual to find them 

 two or three deep. In this condition they remain until spring, 

 when activity is again renewed and the life cycle completed. 



Means of distribution. — The hibernating scales are easily car- 

 ried about on nursery stock. Young nursery trees probably sel- 

 dom become badly infested. All of the infested trees which we 

 have seen had but comparatively few scales on them and these 

 were scattered about on the trunks and branches and were usually 

 hidden in scars on the trunks and near the buds so effectually 

 that they were easily overlooked. Thus the young scales, al- 

 though not protected by a scaly covering, are not easily rubbed 

 off and hence may remain on trees shipped long distances without 

 injury. 



RcmciUal measures. — In the report above referred to we have 

 given a detailed account of a series of experiments with kerosene 

 emulsion ns n remedy for this specic^R. It was found thnt kern 



