6 POMONA JOURNAL OF ENTOMOLOGY 



hairs on the antennae (Figure 5, N). The cornicles are usually longer, in this 

 case being 0.27 mm. in length. In one individual there were two distinct 

 tubercles arising from the abdomen just outside of the cornicles. (Figure 4, 

 A and C.) 



Nymph of Apterous Viviparous Female. — These young are about one- 

 sixth the size of the adult and are like them in most respects. 

 In color they are somewhat lighter in shade — the eyes, however, are very dark. 

 The antennae are made up of but five joints, the fifth being very long, with 

 basal nail-like process. All of the articles except the first two are transversely 

 scabrous. They have no sensoria. The rostrum is longer than the body. 

 The cornicles are short, stout, and clavate in form. The style is obscure. 

 (Figure 4, D.) 



Taken from the lower side of leaves of the common cultivated blue violet 

 at Claremont, Calif., Nov. 12, 1908. In no case were they found in any 

 considerable numbers on any single plant, but occurred in twos and threes on 

 a leaf. 



Figure S. Pemphigus radicicola 



Rhopalosiphum violae (form ?) 



On the same plants and mingled with the wine-colored forms described 

 above are found numerous green individuals, both winged and apterous, which 

 differ in some characters supposedly of generic value. Possibly one or other 

 of the forms may be a migrant generation. Although these two 

 forms are closely associated on the same leaves of the cultivated blue 

 violet, there is a chance that the green forms are a different species after all. 

 With the coming of the spring broods this can be ascertained more definitely. 

 In the meantime a full description of the green form is here given. 



Winged Viviparous Female. — Length 1.69 mm., width 0.8 mm. 

 Prevailing color — dark green. Legs — lighter. Thorax — darker. (Figure 4, 

 B.) Head — Nearly as broad as long, and considerably narrower than the 



