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INJURIOUS INSECTS OF CANADA 



229 



times injured by this black Blister-beetle which like all the other 

 Cantharidce, has a habit of appearing suddenly in large numbers and 

 attacking ravenously any plants they feed upon. 



Live Stock. 



The Cattle Horn-fly (Hœmatohia serrata, Eob.-Desv.). — One of the 

 most remarkable importations of an injurious insect into America \va.^ 

 that of the Cattle Horn-fly, which first appeared in Canada in July, 1893. 

 (Exp. Farm Bull. 14, 1892.) Since then it has spread rapidly through 

 the whole of Canada and has been the cause of enormous loss to dairy 

 farmers. Fortunately through the abundance of its parasitic enemies, 

 this pest has been reduced to almost the same limits as the ordinary 

 Cattle Fly, Stomoxys calcitrans, L. The simplest remedy is the treatment 

 of stock at the time they are liable to attack, with a mixture of one 

 pound of pine tar in ten pounds of lard. 



Stoked Geain. 



The Mediterranean Flour Moth (Ephestia Icuelmiella, Zell.). — This 

 terrible pest of the miller is an importation from the south of Europe, 

 which first came prominently before the public in Canada on account 

 of its injuries, in 1889. (Eep. Exp. Farms, p. 73.) Owing to their habit 



Fi^. 17.— The Mediterranean Flour Moth— enlarged. 



of attaching themselves by means of a silky web to any object upon which 

 they rest, the caterpillars are easily and frequently carried from infested 

 mills to other similar establishments, where they soon make their pres- 

 ence known by covering everything with silken webs, thus putting mil- 



