EXPLANATION OF PLATE XX. 
Brevicoryne (Aphis) brassicae (Linn.), p. 187. 
Fic. 1.—Alate viviparous female (after Essig). 
,  2.—Apterous viviparous female (partly after Essig). 
» 3.—Antenna of alate female. 
»  4.—Antenna of apterous female. 
» 5-—Anal end of alate female showing the cornicle and cauda. 
Siphocoryne pseudobrassicae (Davis), p. 188. 
(= Siphocoryne indobrassicae, n. sp., p. 188.) 
Fic. 6.—Apterous viviparous female. 
.» 7-—Antenna of alate female. 
,  8.—Hind tibia of oviparous female. 
»  9.—Anal end of apterous viviparous female showing the genital plate, the 
cauda and cornicle. 
, 10.—Wings. 
», 11.—Abdomen of alate female. 
