A SYNOPSIS OF THE APHIDIDAE 93 



107. Aphis alamedensis Clarke 



Clarke, Can. Ent., vol. 35, p. 251, 1903 (orig. desc.). 

 Record. Prunus domestica; Berkeley (Clarke). 



This is an unknown species described from specimens taken by 

 Clarke on greengage plum in Berkeley. Davidson suggests that it 

 might be Aphis cardui Lirin. (pruni Koch) from its brief description. 



108. Aphis albipes Oestlund 

 Figures 198 to 200 



Oestlund, Geol. Nat. Hist. Surv. Minn., Bull. 4, p. 52, 1887 (orig. dese.). 

 Williams, Univ. Neb. Studies, vol. 10, p. 119, 1910 (desc.). 

 Davidson, Jour. Econ. Ent., vol. 3, p. 376, 1910 (list). 



Records. Symphoricarpus racemosus; Stanford University (Davidson) ; Con- 

 gress Springs, Santa Clara County, July, 1915 (McCraeken) ; Berkeley, July, 1915 

 (Shinji). 



This species is found at times curling the leaves of snowberry in 

 the San Francisco Bay region. Dr. McCraeken noted in connection 

 with the infestation at Congress Springs, "they are quite prettily 

 patterned with white bars and cross-bars." This is usually enough 

 to distinguish them. 



109. Aphis angelicae Koch. 



Koch, Die Pflanzenlause, p. 521, 1854 (orig. desc.). 

 Wilson, Jour. Econ. Ent., vol. 2, p. 348, 1909 (desc.). 



Record. Angelica sp., Hedera sp. ; California (Wilson). 



Wilson reported this species from California, but gave no locality 

 or date. It is unknown to the author. 



110. Aphis atriplicis Linn. 



Linnaeus, Fauna Sweden, p. 1000, 1761 (orig. desc.). 

 Hayhurst, Ann. Ent. Soe. Am., vol. 2, pp. 88-100, 1909 (desc.). 

 Davidson, Jour. Econ. Ent., vol. 5, p. 407, 1912 (desc. sexuales apterous 



viviparae). 

 Davidson, Jour. Econ. Ent., vol. 7, p. 133, 1914 (desc. fundatrix). 



Records. Chenopodvum album, C. murale; San Jose, Walnut Creek (David- 

 son). 



