﻿262 THE ENTOMOLOGIST. 



yellow-green. Abdomen bright green with three small dark lateral 

 spots before the cornicles and traces of some smaller ones above 

 them. Eyes dark reddish-brown to brown, the two stemmata dark. 

 Antennee deep brown. Cornicles black, except at the base, where 

 they are green. Legs black, except the basal two-thirds of the 

 femora, which are green. Cauda rather long, acuminate, green. 

 Antennae longer than the body, basal segment larger than the 

 second, the third very slightly longer than the fourth, with 20-28 

 sensoria spread over its whole length ; fourth longer than the fifth, 

 the latter with normal sub-apical sensoria ; sixth not as long as the 

 fourth and fifth. Proboscis reaching to or just beyond the second 

 pair of legs, black at the apex. Cornicles long, thin and cylindrical, 

 about as long as the third antennal segment, the apex markedly 

 reticulate, remainder imbricated ; in some specimens the basal one- 

 third of the cornicles may be dark green. Cauda with six long 

 chastae on one side, five the other, and two curved dorsal apically 

 placed ones. Wings large ; stigma yellowish-green ; veins darker. 



Length, 2-5 to 3 mm. Wing expanse, 9 to 10 mm. 



Apterous viviparous female. — Green ; the apices of the femora, 

 tibiae, proboscis and cornicles black, and all the tarsi black. Antennae 

 long, brown, except the two basal segments, which are green, the 

 fourth to sixth darker than the third ; the first segment nearly twice 

 as long and wider than the second ; the third longer than the 

 fourth, but not as long as the sixth, with 3-5 sensoria close together 

 near the base ; apex darker than remainder ; the fourth longer than 

 the fifth ; the fifth imbricated, with the usual sub-apical sensorium 

 close to its apex ; sixth not quite as long as the fourth and fifth ; 

 antennal hairs simple and slightly capitate. Proboscis green, dark 

 at the apex, reaching nearly to or just past the third pair of legs ; 

 broad, the last two segments short. Legs long, green, apices of 

 femora with broad black areas ; narrower apical dark bands on the 

 tibiae and black tarsi ; femora with a few hairs on each side ; tibiae 

 with many more. Cauda long, about half the length of the cor- 

 nicles, bluntly acuminate, green, with six pairs of lateral hairs and 

 two median dorsal ones near the apex, the apical one curved towards 

 the tip. Anal plate green. Cornicles long, about as long as the 

 third antennal segment, rather thin and cylindrical, slightly curved 

 outwards, green, black at the apices, or dark brown and black at the 

 apices ; the dark area at the apex with large marked reticulations, 

 the remainder faintly imbricated. 



Length, 2-5 to 3 mm. 



Food Plants. — Bed valerian {Centranthus rubra) and common 

 valerian {Valeriana officinalis). 



Localities. — Eamsgate and Margate, May 20tb, 1914 ; Wye, 

 June 30th, 1914; Windermere, June li3th, 1914 (Rymer 

 Roberts). 



Observations. — I first found this aphid in dense masses on 

 the red valerian on the chalk cliffs at Ramsgate and Margate 

 on May 20tb. They were then all apterae with a few nymphae. 

 I took home some large colonies, and on the next day some 

 became alate viviparous females, and on the 23rd the alatae 



