138 Yiisconsin Academy of Sciences^ Arts, and Letters. 
prunicola, Aphis Kaltenbach, 1843, Mon. der Pflanzeniause, p. 
122. New name for A. cerasi Schrank. 
Primus domestica, P. persica, P. spinosa. 
prunicoleus, Aphis Ashmead, 18 81. Pacific Rural Press, XXII, 
No. 1, July 2, p. 8. 
Prunus sp. 
prunifoliae, Aphis Fitch, 1855. First Kept. Nox. & Ben. Insects 
N. Y. p. 122. 
Prunus sp. 
Prunina, Aphis Walker, 1850. Ann. Mag, Nat. Hist. VI, ser. 2, p. 
120 . 
Prunus domestica, P. spinosa, Pyrus communis. 
prnnomm, Aphis Dobrowljansky, 1913. Zur. Biol, der Blattlause 
der Obstbaume und Beerenstraucher Ent. Sta. des Land- 
wirstschaft. Syndikats in Kiew. p. 20, fig. ; 
Prunus sp. 
pseudobrassicae, Aphis Davis, 1914. Can Ent., XLVI, p. 231, fig. 
Brassica spp., RapJianus sativus. 
pseudobj'Tsa, Asiphum (Walsh), 1862. Proc. Ent. Soc. Phil., I, p. 
3 06. Byrsocrypta. 
Populus candicans, P. coccinea, P. deltoides, P. fremonti. 
pseudocardui, Aphis Theobald, 1915. Bui. Ent. Research, VI, p. 
120, fig. 
Carduus sp. 
pseudohieracii, Aphis Theobald, 1912. List of Aphididae of the 
Hastings District, p. 9. 
New name for Aphis hieracii Buckton (not Kaltenbach). 
pseiidotsugae, Lachiuis Wilson, 1912. Can. Ent. XLIV, p. 302. 
Pseudotsuga douglassii. 
'*pskovica, Aiioecia Mordwilko, 1916. Revue Russian Entomology, 
XV, p. ? 
“Grass roots.” 
ptarndcae, Microsiphiim Cholodkovsky, 1908. Zool, Anz., XXXII, 
p. 687. 
Achillea ptarmica. 
