9'0 THE KEPOET OF THE No. 36 



Every effort should fee made to get on the ground as soon as possible and to 

 rush the sawing during the first part of the season. Much of the trouble might thus 

 be left in the slab. 



Throughout the reserve the poplar is badly infested with fungi, and with 

 iboring grubs of the long-horned beetles (Cerambycidae). The only conceivable 

 method of controlling either the fungi or the beetles is to cut and burn, at the 

 proper season, all infested trees. Such an operation could not be considered there 

 at the present time, and these diseases of the poplar are likely to continue. 



Dendroctonus pseudotsugae Hopk., has (been injurious in many places in 

 British Columlbia to Douglas Fir; and Dendroctonus hrevicomis Lee, has attacked 

 and killed healthy yellow pine (P. ponderosa) in several localities. D. ponderosae 

 Hopk., has been reported destroying Pinus ponderosa. Bull or Yellow Pine, over 

 a limited area. In the presence of these, and other bark-beetles of similar habits, 

 British Columbia possesses a very serious danger to her forests. They should be 

 carefully watched and outbreaks promptly and skilfully dealt with. 



Dendroctonus valens, Leconte, usually a not very serious secondary enemy of 

 pines and spruce in Eastern Canada, was found this season destroying healthy 

 white spruce. This species is extremely abundant in the pine slash in Algonquin 

 Park, It has entered living bark in large numbers, as evidenced by the pitch-tubes. 

 Jps calligraphus, and many species of the genera Ips, Dryocoetes, Trypodendron, 

 Gnathotrichus, Polygraphus, Hylurgops, Pityophthorus, Pityogenes, and others, are 

 present there in myriads in pine and spruce slash of last winter's cuttings. As long 

 as extensive cutting continues there is probalbly little danger from any species dis- 

 covered there this summer. When the cutting ceases, as it soon must, the second 

 growth pine and spruce will 'be in danger. 



There was noticed this season in different parts of Quebec Province, in On- 

 tario, and particularly in New Brunswick, a rather obscure injury to spruce and fir 

 twigs. The tips of the twigs appear throughout the early summer, dead, brown 

 and dried. On many twigs there are indications of hemipterous injury, but many 

 show no mark of insect work and contain apparently no parasitic fungi. Much of 

 the work seen this season was difficult to explain. Twigs of spruce, fir and pine are 

 commonly injured by various insects. Certain ipid beetles of the genus Pityoph- 

 thorus are locally plentiful boring in and destroying twigs of white and red pine. 

 Certain hemipterons kill many twigs of pine, spruce, and fur by sucking the sap, 

 early in the season, an inch, or several inches from the tip. Cerambycid and ipid 

 beetles do always more or less damage, and at times a great deal, by gnawing the 

 bark from twigs and 'branches of pines. Such injury is seldom of importance, ex- 

 cept on ornamental trees. Pine twigs, or ornamental trees, bored hy Pityophthorus 

 should be cut off and burned as soon as noticed. 



The Birch Leaf Skeletonizer, Bucculatrix canadensisella, Chamb., has been 

 abundant and injurious, notably about Port Arthur, Ont. 



The Pine Leaf-miner, Paralechia piriifoUella, Clem. This interesting miner was 

 aJbundant at Ottawa this season on cultivated jack pine, Pinus hanhsiana. The 

 larva works within the distal half or more of the leaf, sealing up the entrance-hole 

 at the hase of the cavity with a silken film and pupating within. Adults were 

 emerging this year during the last week in June, 



An interesting outbreak of Monohammus scutellatu^ occurred this summer on 

 pine about Port Arthur, Ont. Immense numbers of the adults were feeding upon 

 the bark of twigs and branches of sound trees. 



