REPORT OF THE SOCIETY 8' 



Pea Plant Louse {Macrosiphitm pisi Kali). — Green; eyes red; legs long; 

 migrates in August to clover fields where eggs are laid and first spring generation 

 fe eds. 



Parasites — Aphidius fleicheri Ash., Megonsmus fletcheri Crwd, a chalcid. 



Potato Plant Louse {Macrosiphum solanifolli Ashmead). — Green or pink; 

 migrates to the rose, where winter is spent. Feeds on a large number of plants. 



Green Rose Aphis (Macrosiphum rosae Linn.) — A large pale green aphis with 

 dark antennae and the cornicles long and black. Occurs on roses. 



Black Chrysanthemum Aphis {Macrosiphum sanborni Gill.) — Occurs on 

 chrysanthemums in greenhouses. A brownish-black pyriiorm plant-louse. 



Celer>' Aphis, enlarged, alter G. C. Davis. 



4. Common Shade and Forest Tree Aphids. 



Negnndo Plant Louse {Chaitophorus negundinis Thos.) — A serious pest of the 

 ash-leaved or Manitoba maple in the west. Infested trees soon become covered 

 with honey-dew^ in which a sooty fungus develops. 



Woolly Apple Aphis (Schizoneura lanigera or Americana). — See above. 



The Poplar Leaf Gall Louse {Pemphigus populicaulis Fitch). — Produces a 

 deformity at the junction of petiole and blade of Cottonwood and Aspen. 



Alder Blight {Pemphigus tessellatus Fitch). — A woolly aphid, occurs on bran- 

 ches of alder. Winged forms migrate to the maple. 



Beech Tree Blight {Pemphigus imbricator Fitch). — A similar form on the twigs 

 and leaves of beech. 



Sitka Spruce Gall Aphis {Chermes cooleyi Gillette), Western Hemlock Woolly 

 Aphis {Chermes funitectis Dreyfus), and Sitka Spruce Green Aphis {Aphis abietina 

 Walk) are important economic forms on the Pacific Coast of British Columbia. 



