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Pomona College Journal of Entomology 



Prevailing color — Silvery gray due to quite a thick covering of fine whitish 

 powder, ground color yellowish or pale green throughout. Head — Much narrower 

 than the prothorax, dark. Antennae — (Figure 169 I). Half as long a.s the body, 

 articles I and II dusky, remaining articles light with apical portions dark, lengths 



Figure 169. Aphis brassicae 

 A, winged viviparous female; B, C, apterous viviparous females; D, cornicle of 

 winged female; E, cornicle of apterous female; F, style of winged female, dorsal 

 aspect; G. style of apterous female, ventral aspect; H, antenna of winged female; I, 

 antenna of apterous female. 



