ENTOMOLOGICAL SOCIETY OF ONTARIO. 



69 



age may again be resorted to. The occurence of this insect at Picton was mentioned in 

 the Canadian Horticulturist for July last in a letter by Mr. Craig and the remedy Of 

 burning the foliage recommended. 



Red Spiders (Tetranychus, sp.) Fig 70, have been abundant and very destructive in 

 many places particularly during the hot weather in August. There are doubtless many 

 species of mites included under the general head " Red Spider." 

 These minute plant-feeding mites are extremely difficult to con- 

 trol — when the weather is dry and hot. Frequent waterings 

 with a hose where possible have a good effect, and sweet peas 

 in several gardens at Ottawa were saved in this way. Dust- 

 ing with sulphur also had a marked influence on the mites. 

 Kerosene emulsion applied early to plants known to be infested 

 was perhaps the most fatal remedy, but in large fruit gardens 

 upon black currants and raspberries severe injury was done 

 both by the mites and the frequent applications of the emulsion 

 to the enfeebled foliage. As yet it must be acknowledged no 

 practical remedy has been discovered for these pests when they 

 are abundant and during hot, dry summers. 



The Black Peach Aphis (Aphis persicoz niger, E. F. 

 Smith), appeared last year for the first time in Essex County. 

 This year there has been no complaint from that locality ; but 

 I fear that peach-growers from not recognizing the danger of 

 Fig. 70. this insect are failing to report its presence. Another occur- 



rence was discovered near St. Catharines in a newly set peach orchard. The owner of 

 the orchard, on having his attention drawn to it, promptly rooted up the trees and 

 destroyed them. 



SOME BEETLES OCCURRING UPON BEECH. 



By W. Hague Harrington, F.E.C.S., Ottawa. 



When so many of our forest, shade and orchard trees are defoliated and disfigured 

 by an endless succession of insect pests it is satisfactory to find one of our most beautiful 

 and valuable species comparatively free from such attacks. At the close of summer ths 

 stalwart, handsome beech will be found with its raiment of bright, glossy foliage almost 

 as fresh and unspotted as in springtime, while its neighbours, the maples, elms, etc., are 

 more or less naked and threadbare. Yet, favored as it is, there are several species of 

 moths whose caterpillars find the tough leaves not unpalatable, such as Hyperetis 

 nyssaria, A. & S., whose larva was described by Prof. Saunders in the Canadian Ento- 

 mologist, vol. iii., p. 209, and the pretty little casemaker, Incurvaria acerifoliella, Fitch, 

 which at times so seriously infests the maples. (See Trans.-Ottawa Field Naturalists' 

 Club, No. vi., p. 353.) The trunk when injured, or when the trees become weakened by 

 age, is riddled by the boring larva? of the large Horntail, Tremex columba, Linn, one of 

 the most striking of our Hymenoptera, and becomes gradually the feeding ground of a 

 variety of insects. The majority of the insects, however, which I have found infesting 

 this tree belong to the order Ooleoptera, and while but few of the species do serious 

 injury to the tree when it is still vigorous, it may not be uninteresting to make a brief 

 record of the species which have been noted by myself, or which have been recorded by 

 Dr. Packard in his Forest Insects (Fifth Report of the United States Entomological 

 Commission, pp. 513-520.) 



