ENTOMOLOGICAL SOCIETY OF ONTARIO. 



3a 



effect. Codling moth, Plum curculio, Canker worm, Eye-spotted Bud-moth, Tent cater- 

 pillars and Fall Web-worm have been abundant in some places, but their numbers 

 have been brought down considerably wherever spraying with the arsenites waa 

 resorted to. 



Fig. 14. 



-1, twig with scales ; !«, scale of male ; 1^, winged male ; Ic, scale of female- 

 highly magnified. 



The Oyster-Shell Bark-louse is abundant throughout the province, and where orchards 

 are neglected does much harm. Spraying with kerosene emulsion when the young insects, 

 emerge from the old scales, about 1st June, is the best remedy. The Scurfy Bark-lousBj 

 Chionaspis fw-furus, Fig. 14, was sent from Essex County. One tree was badiy infested^ 

 but a thorough spraying with kerosene emulsion entirely cleaned it. 



The New York Plum-scale (Lecanium) has been found, on enquiry, to be present ta 

 some extent all through the Niagara peninsula and in some other western counties. Only 

 two bad occurrences have been discovered, and I am much pleased to be able to report 

 that these have both been eradicated by treatment with kerosene emulsion. The life- 

 history of this scale is quite different from that of the Oyster- Shell Bark-louse. In this 

 species, the young emerge at the end of June and make their way out on to the foliage, 

 where they remain without growing much until autumn ; they then crawl back again on 

 to the twigs and branches and hibernate there. When revived by the return of spring, 

 they move again and fix themselves to the young wood, chiefly on the lower side of the 

 smaller branches. They grow very rapidly in spring, and the tiny flat scales which 

 hibernated, soon become large, conspicuous, dark brown, hemispherical scales, varying 

 soixiewhat in size, but about one-eighth to one-sixth of an inch in length by about half of 

 that length in height. The basal outline is ovate or almost round, being very nearly as 

 wide as long. This insect has been carefully studied by Mr, Slingerland. of Cornell 

 University, and the remedy which he suggested has been used very satisfactorily both at 

 Qaeenston and Grimsby, where the two serious outbreaks referred to above occurred. 

 3 EN. 



