June, '17] 



GILLETTE AND BRAGG: MYZUS RIBIS 



339 



Fig. 17. Myzus ribis (Linn.). 1, Stem mother, 9 and 13 the cornicle and antenna 

 of same; 2, alate viviparous female, and 3, 4, 11 and 15, the cauda, vertex, cornicle 

 and antenna of the same; 5, apterous viviparous mother of the males, and 6, 7, 10 

 and 14, the cauda and gonopophyses, vertex, cornicle and antenna of same; 8, the 

 oviparous female, and 12, 16 and 17 the cornicle, antenna and tibia of same. 



Original, Miriam A. Palmer, Illustrator. 



The apterous virgogene and the antenna of the alate male differ so little from figures 

 5 and 15 in the plate, it does not seem necessary to figure them. 



