^- 



TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOLUME XLIV 

 NEW APHIDIDAE FROM CALIFORNIA ^ 



BY ALBERT F. SWAIX 



University of California Citrus Experiment Station, Riverside, California 



It is the purpose of this paper to describe several new species 

 of A phididae taken during the past few j'cars in CaHf ornia. Many 

 of these species have been taken by the writer in his study of the 

 plant lice during the past three years, while some others have 

 been obtained from various people in different parts of the state. 

 The species recorded here represent collections made in the vicin- 

 ity of Sacramento; in the San Francisco Bay region, particularh' 

 in the vicinity of Stanford Universit}' and in Berkeley; and in 

 Southern California, particularly in San Diego, Riverside, and 

 Ventura Coimtics. Cotype specimens of all the species are in 

 the writer's private collection in Riverside and in the collection 

 of the University of California. Berkeley. 



Myzocallis davidsoni new species (Figs. 1, 1.5, 34, 35, 36.) 



In the fall of 1915 the writer found a large infestation of a 

 species of Myzocallis on Quercus peduncidata in Berkelej'. On 

 examination this proved to be the same species which had been 

 taken several times on various species of chestnuts (Castanea 

 spp.) and considered as Calap/us castaneae (Fitch). It is a com- 

 mon species in the San Francisco Bay region, having been re- 

 ported several times from Berkeley, Oakland, Stanford Universitj^ 



1 Paper No. 41, University of California, Graduate School of Tropical Agri- 

 culture and Citrus Experiment Station, Riverside, California. 



THAXS. A.M. ENT. SOC. XLIV. 



