Proceedinos^ 1913. 43 



Two species of this group are injurious to fruit-trees. Tlie peacli-tree barlv- 

 beotle (Phlttotribus liminaris) aud the fruit-tree bark-beetle (Eccoptogastcr rugii- 

 losus) are important pests in southern Ontario. The former breeds also in wild 

 cherry in Quebec Trovince; but E. ruguJosus does not apparently occur elsewhere in 

 Canada. 



The clover bark-beetle {Hylastinus oiscurus, Marsh) cuts tunnels similar to 

 those of true bark-beetles in roots of red mammoth alsike and crimson clovers, and 

 is injurious in parts of Quebec and Ontario. 



The deciduous trees of Canadian forests are less subject to injury by. members 

 of this family. Several destructive species found in the northern half of the United 

 States have apparently not yet ventured to cross the boundary. We have many 

 species, but, in the experience of the writer, few attack green bark. 



Ambrosia-beetJes, although belonging to the same family, have quite different 

 habits. The adults bore round tunnels through the bark and into the wood. These 

 tunnels are invariably stained dark brown or black by fungi which grow upon the 

 walls. The eggs are deposited free in the tunnels (Anisand/'iis aud Xylehorus) or in 

 niches similar to those of the bark-beetles, cut along the tunnel-sides (Gnathotrichus, 

 Trypodendron, Pterocyclon) . The larvre of these species enlarge the niches to elon- 

 gate cavities, larval cradles, slightly more than their own length. Each species has 

 invariably associated with it, growing in a dense layer upon the walls of the tunnel 

 and larval cradles, a particular species of fungus. Several species of these ambrosia- 

 fungi have been carefully studied by the writer. Under the proper conditions the 

 conidia germinate readily and pass through the conidial cycle in about sixty hours. 



Both beetles and larvaj feed upon the fungus. The larvte of Anisandrus and 

 most species of Xylehorus feed upon the fungus exclusively ; and with the larvse of 

 all ambrosia-beetles, of this country at least, the fungus is a necessary diet. All our 

 coniferous trees are subject to attack by species of Trypodendron and Gnafhotrichiis. 

 roplar, oak, birch, beech, maple, aud alder are attacked by species of Trypodendron, 

 Anisandrus, Xylehorus, aud Pterocyclon. 



The ambrosia-beetles do not, as a rule, attack sound trees in Canadian forest.s. 

 They enter dying trees, or their parts, and recently felled logs and stumps, in which 

 chemical changes have apparently rendered the sap more suitable to the growth of 

 their fungi. With us their injury is only noticed in felled timber left out of water 

 or in fire-injured stuff. 



RESOLUTION RE QUARANTINE MEASURE. 



" AVhereas this Association at the annual meeting in Victoria last January did 

 pass vnanimously a resolution introduced by the Inspector of Fruit Pests, requesting 

 the Dominion Government to enact such legislation as would prevent the importation 

 of fruit aud other vegetables from countries and Provinces infected with insect 

 pests, bacterial and fungous diseases, not widely prevalent in this Province : 



"And whereas the Dominion Government has admitted that the legislation 

 requested may properly be enacted by the Provincial Legislature, and has graciou.sly 

 signified its desire that a Quarantine Act, with such provisoes as may be necessary 

 to meet the peculiar conditions of this Province and the wishes of the people, as 

 voiced by the Boards of Trade. Fruit-growers' Associations, Farmers' Institutes, this 

 Association, and other public bodies throughout the Province, may be speedily 

 enacted : 



" Be it therefore Resolved, That this Entomological Society, in convention 

 assembled at Vernon, B.C., in the month of July, ]913, hereby reaffirms its opinion 

 that the legislation requested is necessary and expedient, and renews its appeal to 

 the Provincial Government to bring down such legislation at the first meeting of the 

 Provincial Legislature as will adequately protect the agricultural and horticultural 

 industries of this Province from pests and diseases not widely prevalent in British 

 Columbia." 



Moved by G. O. Day, seconded by Lionel E. Taylor. 



