58 Wisconsin Academy of Sciences^ Arts^ and Letters. 
citri, Aphis (Ashmead) Oestlund, 1887. Aphididae of Minnesota, 
p. 69. No description. 
Citrus sp. 
citricidus, Myzus Kirkaldy, 1907. Proc. Hawaii Ent. Soc., I, part 
3, p. 100. 
Citrus aurantium. 
^ citricola, Aphis Van der Goot, 1912. Mitteilungen aus dem Na- 
turehistorischen Museum, XXIX, p. 273. 
Citrus sp. 
citrifolii, Macrosiphum (Ashmead), 1880. Orange Insects, p. 66. 
Citrus sp. 
citrinum Macrosiphum Ashmead as a var. of M. artemisiae Boyer 
which see. 
*citrulli, Aphis Ashmead, 1882. Florida Dispatch, I, p. 241. 
Citrus sp. 
clematidis, Aphis Koch, 1854. Die Pflanzenlause Aphiden, p. 78, 
fig. 
Clematis flammula, C. recta, C. vitalha. 
clematidis, Toxoptera Del Guercio, 1900. Nuov. Relaz. Staz. Agr. 
Fir., II, p. 145. 
Clematis vitalda. 
clinopodii, Aphis Passerini, 1861. Att. Soc. Sci. Nat., Ill, p. 399. 
Calamintha acinos, Mentha sylvestris, Satureja vulgaris. 
cnici, Aphis Schrank, 1801. Fauna Boica, II, p. 122. 
Cnicus oleraceus. 
cnici, Apliis Williams, 1911. Aphididae of Nebraska, p. 40. 
Cnicus sp. 
coccinea, Phylloxera Heyden, 1837. Ent. Beitr. Museum Senken- 
berg, II, p. 28 9. Vacuna. 
Quercus ilex, Q. rohur. 
coccineus, Cliermes Ratzeburg, 1843. Stett. Ent. Zeit. IV, p. 202. 
Ahies halsamea, A. pectinata, Picea ahies Pinus sp. 
