534 Report of the Entomologists op the 



The Oyster-shell Bark-louse. 



Wc have received many specimens of this insect (Mytilaspis 

 pomorum Bouche) from our correspondents. In most cases the 

 complaints were to the effect that the insect was doing serious 

 damage to apple trees. When the scale attacks old trees the 

 injury does not usually extend beyond a few of the limbs, but on 

 young trees the injurious effects are much more noticeable. In 

 one case reported to us, a young bearing apple tree was badly 

 infested on the trunk as well as the main limbs and branches. 



May 11 newly hatched lice appeared on an infested apple tree 

 near the Station, and three days later moulted for the first time. 



Plate XXXVII, fig. 1, is from a photograph of some infested 

 apple twigs. Fig. 2 is from a drawing of a female scale showing 

 the upper and under surfaces of the insect, the manner in which 

 the eggs are protected and some of the eggs greatly enlarged. 



Kerosene emulsion is the most satisfactory remedy. Where 

 practical, the trunk or infested limbs should be scraped and the 

 emulsion, full strength, applied with a stiff brush. This treat- 

 ment should be made iu the winter. The scraping loosens the 

 scales and allows the emulsion to reach the eggs which they pro- 

 tect. Spraying with the emulsion, summer strength, as soon as 

 the young lice hatch in June will also be found effectual. 



Canker Worms. 



An unusual outbreak of canker worms occurred during the 

 past season. In the vicinity of Albion and all through Orleans, 

 Genesee, and Niagara counties the insects were especially abund- 

 ant. Early in June we visited some of the infested sections near 

 Albion. Many fine large trees and, indeed, whole orchards were 

 stripped of every leaf. Observations and inquiries there and 

 elsewhere where the insects were abundant, indicate that both 

 neglect and misdirected effort are the partial causes of such 

 extended injury as was done by this insect last year. Old 

 neglected orchards are too common, while scattered trees along 

 the roadside which have never been sprayed, or received even ordi- 

 nary attention, are more common. These trees furnish breeding 



