42 Wisconsin Academij of Sciences, Arts, and Letters. 
bellus, Callipteinis (Walsh), 1862. Proc. Ent. Soc. Phila., I, p. 299. 
Aphis. 
Myrica gale, Querciis agrifolia, Q. alha, Q. cerris, Q. coccinea, Q. 
macrocarpa, Q. rohur, Q. rubra, Ulmus racemosa. 
berberidis, Aphis Fitch, 1851. Rept. Reg. Univ. State N. Y., Cab. 
Nat. Hist., p. 65. 
Berberis vulgaris f 
berberidis, Liosomaphis (Kaltenbach), 1843. Mon. der Pflanzen- 
lause, p. 95. Aphis. 
Berberis vulgaris. 
berlesei, Sipha Del Guercio, 1904. Redia II, p. 135. fig. 
Aira caryopJiyllea, DescJiampsia flexuosa. 
betae, Macrosiphum (Theobald), 1913. Jour. Board of Agr., XIX, 
No. 11, p. 918. Rhopalosiphiim. 
Beta sp., ''Chenopodiaceae.*' 
betae, Pemphigus Doane, 1900. Ent. News, XI, p. 391. also 
Wash. Exp. Sta., Bui. 42, p. 1. 
Achillea millefolium, Agropyron occidentale, Beta vulgaris, Cheno- 
podium album, Distichlis spicata, Hordeum jubatum, Iva 
xanthifolia. Polygonum aviculare, Populus deltoides, Rumex 
crispus, R. hymenosepalus, R. occidentalis, Solidago sy. 
betae, Smyiithurodes Westwood, 1849. Gardners Chronicle, p. 
420. 
Beta sp. 
betulae, Callipterus Koch, 1855. Die Pflanzenlause Aphiden, p. 
217, fig. 
Betula alba, B. fontinalis. 
betulae, Chaitophorus Buckton, 1879. Mon. Brit. Aphides, II, p. 
139, fig. 
Acer campestre, Betula alba. 
f 
betulae, Euceraphis (Linnaeus), 1758. Edition 10, Systema Na¬ 
turae, p. 452. Aphis. 
Betula alba. 
betulae, Hamanielistes (Mordwilko), 19 01. Horae Soc. Ent. Ross., 
XXXIII, p. 973, fig. Cerataphis. 
Betula alba, B. alpestris. 
