226 



KUYAL ^UCIKTY OF CANADA 



roHi.ST ASÙ Shade Trkks. 



The liirc'li liuceiilalrix {Jhicculalrix CanadensiscUa, Cliamb.), is an 

 enemy of unusual occurrcnco, which was very abundant in Eastern North 



America in 1892. (lîcp. Exp. 

 Farms, 18'i2, p. 50.) 



'I'hc Vancouver Jsh;nd Oak 

 Lo()]icr (E I lo]iia somtiiara , Iluhst)- 

 — Tlie cater])ilhir8 of this moth 

 are measuring worms, and at in- 

 tervals of about four or five years 

 appear in incredible numbers and 

 entirely defoliate the oalc trees 

 over miles of country around Vic- 

 toria, Vancouver Island. (Rep. 

 Exp. Farms, 1890, p. 175.) 



The Spruce Gall-louse (Chcr- 

 mes abietis, L.). — Much anxiet}- 

 has been caused during the hist 

 year or two since the value of 

 spruce limber has been enhanced 

 by its extensive use in the manu- 

 facture of paj^er, by the injuries 

 J !;, , ,T ^nd spread of this insect. (Ont. 



Forestry Ue\\, 1897, p. 39.) 

 The Spruce Bark-borer (Dendrodonus rufipennis, Kirby). — As 

 soon as the spruce forests of eastern Oanada are cut into, this bark- 

 beetle appears and docs much damage by attacking the bark of the trees 

 standing nearest the openings. The same species occurs in Northwest- 

 ern Canada and injures spruce timber in the sïime Avay as it does in New 

 Brunswick and Quebec. (Eep. Exp. Farms, 1887, p. 35.) 



The Larch Sawfly (Nematus Ericlisonii, ITartig). — In 1883, this 

 sawfly, a European species which had been observed in small num- 

 bers in the Eastern Townships of Quebec during the previous year 

 (Rep. Ent. Soc. Ont., 1883, p. 17), attracted general attention by its 

 abundance and tlie rapidity with wliich it was spreading through the 

 country. It has since that time destroyed millions of feet of valuable 

 larch timber and has now spread to the shores of Hudson Bay and 

 through Labrador. Fortunately in many places where it was formerly 

 abundant it has now almost entirely disappeared. 



The Spruce Sawfly {Lopliyrus ahiciis, llarr.). — Through North- 

 western Ontario and Manitoba the spruce trees are frequently stripped 

 of their leaves by the larva; of the Spruce Sawfly. Where, as is fre- 



