160 Wisconsin Academy of Sciences, Arts, and Letters.- 
jsonchi, Rhizobius Passerini, 18 60. Gli Afidi, p. 39. 
Achillea millefolium, Cichorium endivia, C, intyhus, Fragaria vesca, 
Galeopsis ladanum, Sonchus arvensis, S. asper, S. oleraceus, 
Stachys annua. 
jsonclii, Rhopalosiphum Oestlund, 1886. Aphididae of Minnesota, 
p. 34. 
Sonehus asper. 
sorbi, Aphis Kaltenbach, 1843. Mon. der Pflanzenlause, p. 70. 
Crataegus oxyacantha, Plantago major, Prunus avium, Pyrus 
aucuparia, P. communis, P. malus, P. torminalis, ''Tamarantia 
sp.f' Viburnum latana. 
sorg'hella, Aphis Schouteden, 1906. Ann. Soc. Ent. Belg. L, p. 135. 
Sorghum sp. 
«orghi, Aphis Theobald, 1904. First Kept. Welle. Lab., p. 43, fig. 
Sorghum vulgare. 
sparthani, Schizoneura Boisduval, 1866. Bui. Soc. Ent. Prance, 
(4), VI, p. LX. 
Cytisus scoparius, Spartiwm junceum-. 
spartii, Macrosiphum (Koch), 1855. Die Pfianzenlause Aphiden, 
p. 172, fig. Slphonophora. 
Cytisus scoparius. 
spectabilis, Aphis Ferrari, 1872. Ann. Mus. Civ. Stor. Nat. Ge¬ 
nova, II, p. 64. 
Salix speciosa. 
■spicatus, Rhizobius Hart, 1894. Eighteenth Kept. Nox. & Ben. 
Insects, Ill., p. 104, fig. 
Panicum dichotomiflorum, P. proliferum, Zea mays. 
spinarum, Aphis Hartig, 1841. Zeit. Ent. (Germar) III, p. 370. 
Prunus spinosa. 
spinosa, Phylloxera (Shinier), 1869. Trans. Amer. Ent. Soc., II, 
p. 397. Dactylosphaera. 
Carya cordiformis. 
spinosus, Chaitophorus Oestlund, 1886. Aphididae of Minnesota, 
p. 49. 
Quercus macrocarpa. 
