Vol.1] Essig. — Aphididae of California 321 



On June 27, 1916, Professor C. W. Woodworth took at St. 

 Helena a plant louse from Carnm kelloggii Gray which appears 

 to be the same species. The apterous viviparous females, which 

 were the only forms collected, agree in size, shape and coloration, 

 but the Cauda is wider and the antennal joints somewhat shorter. 



NOTES ON OTHER APHIDIDAE 



Chiefly from the Campus of the University of California, 



Berkeley, California 



PhyUaphis. sp. (fig. 12.) A pale greenish or yellow plant louse 

 which secretes over the body a quantity of white woolly material 

 and which has commonly been called Pliyllaphis querci Fitch. 

 It is not that species, as has been pointed out by Baker" and is 

 probably not P. quercifoliae Gillette.^ It occurs in considerable 

 numbers on the undersides of the leaves of the coast live oak, 

 Quercus agrifolia Nee., on the campus, but only apterous forms 

 have been secured here thus far. Specimens were received from 

 Altadena, California, August 14, 1916, taken on the same host 

 plant. What also appears to be the same thing was collected at 

 Rutherford, California, June 21, 1916, on valley oak, Quercus 

 Jobafa Nee. The lot included one winged male which agrees 

 very well with Gillette's description of the same sex of P. querci- 

 foliae. 



PltijllapJiis fagi (Linn.). A small yellow and black species 

 densely covered with white woolly material was taken on the 

 undersides of the leaves of Fag us tricolor in a lath-house at 

 Oakland, California, July 25, 1916. All forms appear somewhat 

 smaller than specimens which I have under that name in my 

 collection. 



Drepanosiphum platanoides (Schrank). A large dark or pale 

 green species infesting the leaves of Norway maple, Acer plata- 

 noides Linn., and silver maple, A. sacckarinum Linn., in Berkeley, 

 and neighboring cities. The dark sexual forms are abundant in 

 September and October. This is the commonest species attacking 

 the maple here. 



Drepanaphis acerifolii (Thomas). This very pretty insect 

 is gray and black in the winged form and pale yellow in the 



- Baker, A. C, Ent. News, vol. 27, p. 361, 1916. 



' Gillette, C. P., Ent. News, vol. 2-5, pp. 274-275, 1914. 



