124 Wisconsin Academy of Sciences, Arts, and Letters. 
pemphigoides, Phylloxera Donnadieu, 1887. Compt. Reud. Acad. 
Sci. Paris, CIV, p. 1246. 
Yitis vinifera. 
penicillata, Aphis Buckton, 1879. Mon. Brit. Aphides, II, p. 51, 
fig. 
EpiloMum hirsutum, E. montanum. 
pentstemonis, Aphis Williams, 1911. Aphididae of Nebraska, p. 
54. 
Musenum tenuifolium, Pentstemon glaher. 
perforans, Phylloxera Pergande, as a var. of P. caryae-septum 
Shimer, which see. 
perforatus, Aphis Signoret, 1867. Ann. Ent. Soc. Prance, (4), 
VII, p. 379. 
Acer campestre. 
pemiciosa, Phylloxera Pergande, 1904. Proc. Dav. Acad. Sci., IX, 
p. 251. 
Carya alba. 
persequens, Aphis Walker, 1852. List Homop. Insects Brit. Mu¬ 
seum, part 4, p. 1044. 
Tanacetum sp. 
persicae, Aphis Boyer de Fonscolombe, 1841. Ann. Soc. Ent. 
France, X, p. 175. 
Petasites officinalis, Prunus amygdalus, P. domestica, P. inaititia, 
P. per Sica, P. spinosa. 
persicae, Aphis Kaltenbach, 1843. Mon. der Pflanzenlause, p. 93. 
Prunus persica. 
persicae. Aphis Koch, 1854. Die Pfianzenlause Aphiden, p. 61, fig 
Prunus persica. 
persicae, Lachnus Cholodkovsky, 1899. Zool. Anz., XXII, p. 472, 
fig. 
Prunus amygdalus. 
persicae, Myzus Passerini, 1860. Gli Afidi, p. 35. 
Prunus persica. 
