APHIS ATRIPLICIS. 87 



about half the length of the cornicles. The abdomen 

 is dusted with a white mealy powder. 



Pupa. 



Eather small. Head very broad. Wing-cases pale 

 green. Abdomen much ringed. Carination marked. 

 Legs pale. 



Whiffed viviparous female. 



Wholly black, somewhat shining. Two strong spines 

 on the prothorax. Legs rather short, upper part of 

 the femora and the tibiae ferruginous. Wings very 

 delicate. Insertions, cubitus, and stigma pale yellow ; 

 other veins pale brown. Eyes black. Three obscure 

 spots on the abdomen. 



Taken in July and August whilst feeding on the 

 pods of the laburnum, Gytisus laburnum. 



Aphis atriplicis, Linn. Plate LXV, figs. 4 — 7. 



Aphis chenojjodii, Schr., Kalt. 

 — atriplicisj Pass. ? 



Apterous viviparous female. 



Inch. Millimetres. 



Size of body 0-070x0-040 1-77x101. 



Length of antennae 0-040 1-01. 



„ cornicles 0-010 0-25. 



Larvae coloured of all shades, from green through 

 olive to black, may be seen feeding at the same time on 

 the same plant of the common orache, Atriplex patula. 



