14 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 67 



Described from a single alate viviparous female taken by L. C. 

 Bragg on lettuce at Marblehead, Mass., October 4, 1920. 



This species can be distinguished from cosmopolitana on lettuce, 

 by its larger size, more numerous sensoria, darker legs, and by its 

 lighter colored abdomen without lateral dark patches. 



Type. — Deposited in the U. S. National Museum. Cat. No. 

 26371. 



AMPHOROPHORA BRITTENII (Theobald) 



Figs. 7-9 and 62-66 



Rhopalosiphum brittenii Theobald, Journ. Econ. Biol., vol. 7, 1912, p. 

 107.— Patch, Maine Agr. Exp. Sta. Bull. 225, 1914, p. 68.— Wilson and 

 ViCKERY, Trans. Wis. Acad. Sci. Arts and Letters, vol. 19, pt. 1, 1918, 

 p. 46.— Jackson, The Scot. Natur., 1917, p. 85; 1919, p. 158. 



I have not seen this species. The alate and apterous viviparous 

 females are described by Theobald. Miss Jackson (1919) gives a 

 description of the oviparous female. 



Host plants. — Red and black currants and gooseberries. 



Distribution. — England, Scotland, Ireland, and Wales. 



Cotypes. — Deposited in Theobald's collection. 



AMPHOROPHORA CARDUELLINA (Theobald) 



Figs. 45-48 and 67-69 



Rhopalosiphum carduellinum Theobald, Bull. Ent. Res., vol. 6, 1915, p. 

 113. — -Wilson and Vickery, Trans. Wis. Acad. Sci. Arts and Letters, 

 vol. 19, pt. 1, p. 49.— Theobald, Bull. Ent. Res., vol. 11, 1920, p. 67. 



In Theobald's first paper he described the alate form of this species- 

 and also described an apterous form. In his second paper he gave 

 another description of an apterous form, stating that his first descrip- 

 tion referred to another species. Dr. J. T. Potgieter has shown the 

 writer specimens from South Africa which he considers to be this 

 species. The apterous form seems to agree more nearly with the 

 second description of Theobald than with the first one. Doctor 

 Potgieter's specimens however have sensoria on segment V of the 

 antennae. These specimens will be fully described in Doctor Pot- 

 gieter's forthcoming paper on South African Aphiidae. 



The chief difference between this species and cosmopolitana seems 

 to be in the presence of sensoria on segment IV and V of the apterous 

 form. In a large series of cosmopolitana which I have examined there 

 are sensoria only on segment III. The range of sensoria on segment 

 III of corduellina seems to be somewhat greater while in the alate 

 form the range on segment III seems to be somewhat less than in 

 cosmopolitana. 



The cotype specimens were taken on Carduus species in Transvaal 

 in 1914. Those belonging to Doctor Potgieter were taken on Sonchus 

 species. 



