132 Wisconsin Academy of Sciences, Arts, and Letters. 
plantaginis, Aphis Schrank, 1801. Fauna Boica, II, p. 106. 
Achillea millefolium, A. ptarmica, Artemisia a'bsintMum, A. cam- 
pestris, A. vulgaris, Beilis perennis, Capsella dursa-pastoris. 
Chrysanthemum leucanthemum, Daucus carota, EpiloMum 
inolle, Erigeron canadensis, Gossypium herhaceum. Inula 
squarrosa, Leontodon taraxici, Leonurus cardiaca, Lynchnis 
dioica, Plantago lanceolata, P. major, P. media. Taraxacum 
officinale, Viola odorata. 
*plantaginis, Aphis Goeze, 1778. Entomologische Beitnage, p. 
318. no. 33. 
plataniy Liachnus Kaltenhach, 1843. Mon. der Pflanzenlause, p. 
152. 
Platanus occidentalis, TJlmus campestris. 
platanicola, Lachnus Riley, 1883, Amer. Nat., XVII, p. 198. 
Platanus occidentalis. 
platanoides, Aphis Hartig, 1841. Zeit. Ent. (Germar), III, p. 
369. Acer. 
platanoides, Drepanosiphum (Schrank), 1801. Fauna Boica, II, 
p. 112. Aphis. 
Acer campestre, A. platanoides, A. pseudo-platanus, Platanus occi¬ 
dentalis. 
*poae, Aphis Hardy, 1850. North British Agriculturist, II, p. 
112 . 
Poa sp. 
poae, Macrosiphum (Macchiati), 1885. Bui. Soc. Ent. Ital., 
XVII, p, 62. Siphonophora. 
Bromus sterilis, Poa annua, Rudus idaeus. 
poae, Rhizobius Thomas, 1879, Eighth Kept. State Ent. Ill., p. 
166. 
Poa annua. 
poae, Rliizohius Buckton, 1883. Mon. Brit. Aphides, IV, p. 93, fig. 
Poa annua. 
poae, Rhopalosiphum Williams, as a var. of R. dianthi Schrank 
which see 
poae, Rhopalosiphum Gillette, 1908. Can. Ent., XL, p. 61, fig. 
Poa pratensis. 
