584 Report of Entomologists of the 



and slightly oval above. The slender carved setie, bj means of 

 which the food is obtained, are shown in the figure. 



AlS would be sujDposed, a swarm of little scales are produced from 

 a single mother. After leaving the mother shell, they travel about 

 apparently aimlessly for a time but within a few days settle down, 

 most of them upon the under surface of the leaves along the mid 

 ribs and larger veins, although many may be found upon the upper 

 surface as well. Still others, however, may be found scattered 

 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 quince trees they seem 

 to )5refer the upper surfaces. Out of a large number of infested 

 quince leaves examined, only an occasional scale could be found on 

 the under surfaces, while the upper surfaces were moderately 

 infested. The heavy pubescence on the under surface of the quince 

 leave may account for this change in the insect's habits. 



The little insects now insert their tiny setse into the leaves or 

 twigs, causing the sap to flow from which they obtain sus- 

 tenance. It should be remembered that these scales are very small 

 at this time. They are also very light in color, being almost semi- 

 transparent, and as they stick very close to the leaves are very easily 

 overlooked. Hence, in examining the leaves for them, it is well to 

 use a small magnifying glass. When examining plum leaves the 

 under sides sliould be examined first, as most of the scales will be 

 found there, but with quince leaves the scales should be looked 

 for on the upper surfaces. 



Comparatively little change takes place in the appearance of the 

 scales from now on during the summer. They grow slowly,* how- 

 ever, and change to a darker color. They also secrete honey dew 

 during this time, and when abundant undoubtedly weaken the trees. 



During the latter part of August or early in September f the 

 young scales return from the leaves and seek shelter upon the twigs 

 and branches, usually upon the under side, and also upon the 

 trunks. On badly infested trees they may frequently he found 

 over-lapping one another, and in sheltered places, as in crevices in 

 the bark, it is not unusual to find them two or three deep. 



The scales are now of a dark reddish brown coloj-. They 

 become quite firmly attached to the bark and unless cue is familiar 



*Mr. Slingerland notCF, Bui. 82, Cornell Agr. Evp. Station, p. 6'.H, that during the summer 

 <1S94) the young scales increased to twice their former size. 

 t September 8 (189.5), scales were found migrating at Geneva. 



