342 University of California PuUications [Entomology 



Aphis salicicola (Thomas). A pale green species with bright 

 orange-colored males. Very abundant on the tender tips of the 

 arroyo willow, Salix lasiolepis Benth., Rutherford, California, 

 June 21, 1916. The species occurred on the same plant through- 

 out the summer and fall at Berkeley and on September 20, 1916, 

 the sexual males and females were also abundant and mating 

 freely. 



Aphis sambucifoliae Fitch. The winged and apterous vivi- 

 parous females are dull black while the sexuparae are amber or 

 dull brownish. The former occur throughout the summer on 

 the blue elderberry, Samhucus glauca Nutt. The sexuparae were 

 taken in few numbers on the leaves of the red elderberry, 8. 

 racemosa caJlicarpa Jepson, on the campus, September 21, 1916. 



Myzaphis abietina (Walker). A very small dark green aphid 

 common on the smaller branches of the Norway spruce, Picea 

 excelsa Link, in Golden Gate Park, San Francisco, California, 

 May 25, 1916. 



Myzaphis rosarum (Kalt.). A small dark green species often 

 very abundant on the leaves of roses and usually the most serious 

 rose pest, causing severe smutting of the foliage. Taken at 

 Berkele}^, California, June 16, 1916, and throughout the summer 

 and fall. 



Siphocoryne capi'cae (Fab.). The apterous forms are pale 

 green and the winged forms pale green and black. Common here 

 on willows, including the arroyo willow, Salix lasiolepis Benth., 

 campus, June 13, 1916. Also abundant on the wild or sweet anise, 

 Carum kelloggii Gray, at St. Helena, California, June 18, 1916 

 (C. W. Woodworth) and at Berkeley, California, June 20, 1916. 

 It is the commonest aphid attacking the latter. 



Siphocoryne xylostei Schrank. A dull green species often 

 with thin coating of whitish pulverulence. Common on the tender 

 shoots of the honeysuckle, Loniccray spp. Taken at Berkeley, 

 California, July 20, 1916, by Miss A. AVilliamson. 



Liosomaphis herheridis (Kalt.) A small yellow or pale green 

 aphid often very abundant on various species of the barberry 

 and causing considerable smutting. Taken on Berheris vulgaris 

 Linn., Golden Gate Park, San Francisco, California, June 5, 

 1916; on Berheris, sp., campus, June 7, 1916, and on B. vulgaris 

 Linn., Niles, California, September 30, 1916. 



Cerafaphis lataniae (Boisduval) (fig. 26). This is a very 

 interesting plant louse and more often taken for a scale insect or 



