. Ontario Sessional Papers, 1902, . nerations or broods produced during the summer are wingless, butat intervals winged broods occur. This is very probably a provision for the distribution ofthe species. The last brood of the season is a winged one, composed of both males andfemales. Soon after mating the males die, while the females perish after the depositionof the eggs. Plant-lice have possibly more enemies, which feed upon them, than most other injurious-insects. These enemies are Lady-birds, Braconids, Apliis lions, maggots of Syrphus-tlies, andcertain other dipterous maggots. Al
. Ontario Sessional Papers, 1902, . nerations or broods produced during the summer are wingless, butat intervals winged broods occur. This is very probably a provision for the distribution ofthe species. The last brood of the season is a winged one, composed of both males andfemales. Soon after mating the males die, while the females perish after the depositionof the eggs. Plant-lice have possibly more enemies, which feed upon them, than most other injurious-insects. These enemies are Lady-birds, Braconids, Apliis lions, maggots of Syrphus-tlies, andcertain other dipterous maggots. All of these kill immense numbers of Aphids, and in someinstances exterminate them, but in most cases extreme rapidity of development more than-c1 ENTOMOLOGICAL SOCIETY. 47 regarding the purplish swellings. Fifr. 2S. Plant-lice (Aphis) winged and wing-less (math enlarged). blister-like elevations on affected leaves^, whichmake their appearance in May. In the con-cavities on the under surface will be found clusteredlarge numbers of Aphids, both winged andunwinged, all busy sucking the juices from theloaf. It is .seldom that these Ajjhids arc troublesomeafter midsummer. Prompt picking of affected leaves, or applicationscf Kerosene Emulsion, whale oil soap solution, orGilletbs Lye, are the best methods of dealing withCurrant Aphis.
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