14 John June Davis 



length and 0.026 in breadth. Camera lucida drawings of the 

 antenna, cornicle and style shown on Plate III, figs. 38 to 40. 



51. A. helianthi Monell. 



52. A. impatientis Thomas. 



" Aphis impatientis Thos. No. 66. On Impatiens pallida, 

 Aug. 22, '90." 



Two winged — one in poor condition — and seven pupae on slide. 

 Antennae not reaching to base of cornicles; segment III with 9 

 to 13 rather large sensoria, more or less in a row, segment IV 

 with 4 to 7 in a row, and V and VI base with the usual distal 

 ones. Measurements of antennal segm.ents as follows: 



Venation more or less irregular, M. (first branch of the third 

 discoidal) branching midway or slightly nearer the apex of the 

 wing. Cornicles cylindrical, wider at the base than at the apex, 

 and slightly shorter than antennal segment IV. Otherwise as 

 Thomas described it. 



Camera lucida drawings of the head, antenna, wing, cornicle 

 and style of winged viviparous female are given on Plate III, 

 figs. 42-45. 



53. A. gossypii Glover {A. lilicola Williams). 



" Aphis lilicola n. sp. Type No. 6"/. On Lilium candidum. 

 Greenhouse, Lincoln, Jan. 12, 1891." 



Two winged and one wingless viviparous female and several 

 immature on the slide. 



Winged viviparous female: Segment III of the antennae bears 6 to 9 

 circular sensoria in a row. Measurements of three antennae of the two 

 specimens on the slide are as follows : 



Camera lucida drawings of the antenna, wing, cornicle and 



266 



