40 Wisconsin Academy of Sciences, Arts, and Letters. 
avenae, Aphis Fabricius, 1775. Systema Entomologiae, p. 73 6. 
Agrostis alta, Apium graveolens, ArrJienatherum elatius, Arena 
fatua, A. orientalis, A. sativa, A. strigosa, Bromus hordeaceons, 
B. inermis, B. racemosus, B. secalinus, B. unioloides, Capsella 
hursa-pastoris, Coreopsis sp., Crataegus coccinea, C. oxyacantha, 
Cydonia vulgaris, Dactylis glomerata, Elymus canadensis, E. 
geniculatus, E. virginicus, Euchlaena mexicana, Festuca ovina, 
F. ovinaduriuscula, F. ruhra, Glyceria fluitans, Holcus lanatus, 
Hordeum disticTion, H. liexasticJion, H. jubatum, H. murinum, 
H. vulgare, Koeleria cristata, Folium multiflorum, L. perenne, 
Melica bauMni, M. penicillaris, Optilaster opulifolius, Phalaris 
arundinacea, Phleum pratefise, Poa annua, P. compressa, P. 
pratensis, P. trivialis, Polygonum persiearia, Primus padus, P. 
virginiana, Pyrus communis, P. germanica, P. malus, Secale 
cereale, Setaria glauca, S. italica, Sorghum halepense, S. sac- 
charatum, S. vulgare, Syntherisana sanguinale, Triticum 
dicoccum, T. vulgare. 
avenae, Sipha Del Guercio, 1900. Nuov. Relaz. Staz. Ent. Agr. 
Fir., II, p. 116. 
Arena sativa, Cynodon dactylon, Hordeum murinum. 
avenivorum, Macrosiphum Kirkaldy, 1905. The Entpinologist, 
XXXVIII, p. 132. 
New name for Macrosiphum granaria (Kirby) Buckton. 
baccharidis, Macrosiphum (Clarke), 1903. Can. Ent. XXXV, p. 
254. N ectarophora. 
Baccharis sp. 
bakeri, Aphis Cowen, 1895. Hemiptera of Colo., p. 118. 
Amsinckea sp., Anthemis sp., Artemesia sp., Crataegus sp., Gna- 
phalium sp., Medicago sativa, Melilotus alba, Pyrus communus, 
P. malus, Senecio vulgaris. Trifolium pratense, T. repens. 
balbianii, Phylloxera Lichtenstein, 1874. Compt. Rend. Acad. 
Sci., LXXIX, part 2, p. 781. 
Food plant? 
ballii, Brachycolus Gillette, 1^08. Can. Ent., XL, p. 67, fig. 
Carex nebraskensis. 
ballotae, Aphis Passerini, 1860. Gli Afidi, p. 35. 
Ballota nigra, Marrubium sp. 
balsamiferae, Pempliigus Williams, 1911. Aphididae Nebraska, 
p. 8. 
Populus balsamifera. 
