Abstract:
Descriptions, illustrations, host plants and a key to the 37 species of Aphis L. found in Manitoba are presented. Five species are described as new: aphis bulleri Robinson and Rojanavongse new species on Ribes sp., Aphis duckmountainensis Rojanavongse and Robinson new species on Senecio pauperculus Michx., Aphis manitobensis Robinson Rojanavongse new species on Ribes sp., Aphis neomonardae Rojanavongse and Robinson new species on Agastache foeniculum (Pursh) Ktze. and Monarda fistulosa L., and Aphis whiteshellensis Rojanavongse and Robinson new species on Amelanchier alnifolia Nutt. Other species of Aphis L. which are described are armoraciae Cowen, asclepiadis Fitch, astragalina Hille Ris Lambers, ceanothi Clarke, corniella (Hille Ris Lambers), craccae Linnaeus, decepta Hottes and Frison, fabae Scopoli farinosa Gmelin, forbesi Weed, gossypii Glover, helianthi Monell, heraclella Davis, knowltoni Hottes and Frison, maculatae Oestlund, masoni Richards, nasturtii Kaltenbach, neogillettei Palmer, neomexicana (Cockerell), nivalis Hille Ris Lambers, oenotherae Oestlund, oestlundi Gillette, pomi DeGeer, ribiensis Gillette and Palmer, rubicola Oestlund, rumicis Linnaeus, saniculae Williams, sedi Kaltenbach, spiraecola Patch, spiraephila Patch, thaspii Oestlund and varians Patch... Many of the previous descriptions of fundatrices, alate and apterous viviparous females, and males and oviparae were inadequate. Some of these are described in this thesis in detail for the first time, from Manitoba material.
