Aphis atriplicis. 



These galls demand a special notice, in that they are (so 

 far as the author is aware) unique, owing to the fact that 

 they harbour the ova, larva;, pupze, the male, and the female 

 imagines all at one and the same time. 



In some places the galls are very plentiful. Repeated 

 observations, during several seasons, have been made upon a 

 large number of plants of A triplex angustifolia and A. patula 

 growing plentifully in one spot near Hastings. The severity 

 with which they had been attacked is indicated by the fact 

 that upwards of 40 per cent, of the leaves were galled. It 

 is probable that in the autumn the imagines migrate to other 

 plants on which to hybernate during the winter, and that 

 before doing so the females deposit ova within the dying 

 leaves of the orache. When detached by senile decay, these 

 leaves are blown about to other spots ; and although many 

 larvae hatch and perish from want of food, some remain unde- 

 veloped until the following spring. The larvae are "coloured 

 all shades, from green through olive to black." The pupae 

 are subject to considerable variation in size, and in colour are 

 " black, marked with white patches." The imagines comprise 

 apterous and winged viviparous females, and apterous, oviparous 

 females, and also apterous males. 



The illustration is of specimens gathered at Hastings by 

 the author. 



