Mr. F. Walker's Descriptions 0/ Aphides. 299 



sporum, Heracleum Sjjhondijlium, Plantago lanceolata, Stachys syl- 

 vatica, Tussilago Farfara, T. petasites, and Potentilla anserina. 



The*front is hairy and somewhat notched : thefirst joint of the 

 feelers has on the inner side of its tip a slight process which is 

 most developed in the wingless female. It is common in the 

 neighbourhood of London and of Lancaster, and Mr. Hardy has 

 found it near Newcastle. 



The viviparous ivingless female . This is small, hairy, elliptical, 

 rather narrow and flat, almost transparent, white or tinged with a 

 very pale green or straw-colour : the eyes are dark brown : the 

 mouth is white with a black tip, and reaches the middle hips : the 

 feelers are slender, setaceous, hairy, much longer than the body ; 

 their tips are brown ; the fourth joint is much shorter than the 

 third ; the fifth is shorter than the fourth ; the sixth is rather 

 more than one-fourth of the length of the fifth ; the seventh is 

 nearly as long as the third : the eyes are black : the nectaries are 

 rather more than one-fom-th of the length of the body; they are 

 somewhat thicker towards the tips which are black : the legs are 

 long, slender and hairy : the feet are black. The young are nar- 

 row and linear. It is infested by an Alloiria. 



1st var. Pale green with two rows of transverse vivid green 

 spots along the back. 



2nd var. The nectaries are not more than one-twelfth of the 

 length of the body. 



3rd var. The feelers are rather longer than the body : the 

 nectaries are about one-ninth of its length. 



4th var. The body and the limbs are white : the eyes, the tips 

 of the feelers, of the mouth, of the nectaries and of the feet are 

 black : the nectaries are one-sixth of the length of the body. 



5th var. Very pale rose-colour, or pale yellow tinged with pale 

 red, not shining : there is a deeji red stripe down the middle of 

 the body : the head is white : the feelers are white, and much 

 shorter than the body ; the tips of some of the latter joints are 

 black : the mouth is white ; its tip and the eyes are black : the 

 nectaries are white with black tips, and about one-sixth of the 

 length of the body : the legs are white ; the tips of the feet are 

 black. 



6th var. Greenish white with two very large vivid green spots 

 near the base of the nectaries. 



7th var. The body is white : the feelers are a little longer than 

 the body : the eyes, the tip of the mouth, and the tips of the 

 shanks and of the feet are black : the nectaries are nearly one- 

 third of the length of the body. 



8th var. The body is pale yellow : the feelers are black towards 

 the tips, and a little longer than the body : the mouth is ])ale 

 yellow ; its tip and the eyes are black : the nectaries are also pale 



