48 Wisconsin Academy of Sciences^ and Letters. 
callae, Macroslphum? (Henrich), 1909. Verhand. Mitt. Sieb. 
Ver. Naturw. LIX, p. 26, Siphonophora. 
Ricfiardia africana. 
callipterus, Aphis Hartig, 1841, Zeit. Entom. (Germar)'III, p. 369, 
Betula sp. 
callunae, Aphis Theobald, 1915, The Entomologist, XLVIII, p. 
260. 
Calluna vulgaris. 
calotropMis, Aphis Del Guercio, 1916. Redia, XI, p. 299, fig. 
Calotropis, procera. 
caltliae, Rhopalosiphum Koch, 1854. Die Pflanzenlause Aphiden, 
p. 48, fig. 
Caltha palustris. 
camelhae, Toxoptera (Kaltenbach), 1843, Mon. der Pflanzen¬ 
lause, p. 122. Aplils. 
Camellia japonica, Citrus medica. 
cameliicola, Aphis Del Guerclo, 1913. Redia, IX, p. 161, fig. 
Camellia sp. 
campanulae, Macrosiphum (Kaltenbach), 1843. Mon. der Pflan¬ 
zenlause, p. 26. Aphis. 
Aster Unosyres, Campanula erinus, C. persicifolia, C. rotundifoUa, 
C. traccUelmm, Chrysanthemum • leucanthemum, Specularia 
speculum. 
campanula-riparia, Aphis Rafinesque, 1817. Amer. Mon. Mag, 
& Critic, Rev, I, p. 361. 
Campanula rotundifoUa. 
canadensis, Microsiphum (Williams), 1911. Aphididae of Ne¬ 
braska, p. 89. Oryptosiphum. 
Artemisia canadensis, A. ludoviciana. 
f 
canadensis, Pemphigus Del Guercio, 1913. Redia, IX, p. 151, fig. 
Populus canadensis, P. nigra. 
canae, Aphis Williams, 1911. Aphididae of Nebraska, p. 39. 
Artemisia cana. 
candicans, Aphis Passerini, 1879. Bui. Soc, Bnt, ItaL, XI, p. 46. 
Orohanche ramosa. 
