44 Mr. F. Walker's Descriptions of Aphides. 



each side of the abdomen : there is a row of small tubercles on 

 each side of the body : the feelers are pale yellow, black towards 

 the tips, and not half the length of the body : the month is pale 

 yellow ; its tip and the eyes are black : the nectaries are white, 

 and not one-fifth of the length of the body : the legs are yellow 

 and rather short ; the knees are brown ; the feet and the tips of 

 the shanks are black. 



1st var. The body is pale yellow. 



2nd var. The body is pale yellow with two large green spots 

 on each side of the abdomen. 



Found on Cerasus Avius, the wild cherry, near Carlisle in the 

 middle of November. 



89. Aphis Carduina, n. s. 



The viviparous wingless female. The body is rather small, oval, 

 somewhat flat, pale green : the front is narrow and rather bristly, 

 and has a tubercle on each side : the feelers are yellow, and much 

 longer than the body ; the tips of the joints are black : the first 

 and the second joints are angular ; the fourth is much shorter 

 than the third ; the fifth is as long as the fourth ; the sixth is not 

 half the length of the fifth ; the seventh is about four times the 

 length of the sixth : the mouth is pale yellow ; its tip and the 

 eyes are black : the tube at the tip of the abdomen is short : the 

 nectaries are pale green with black tips, and nearly one-fourth 

 of the length of the body : the legs are long and pale yellow ; the 

 knees, the feet, and the tips of the shanks are black. In the 

 beginning of November. 



The viviparous winged female. It is like the wingless insect in 

 colour, but somew^hat darker about the chest : the wings are 

 colourless, and much longer than the body ; the second vein 

 diverges from the first, but is nearly parallel to the third; the 

 second fork of the latter begins a little after one-third of the 

 length of the vein, and its lower branch converges slightly 

 towards the second vein; the second fork is beyond two-thirds 

 of the length ; the fourth vein is curved moderately and equally 

 throughout its length, and the angle of the brand whence it 

 springs is very slight. 



Length of the body ^ line; of the wings 1^ line. 



Found on the thistle from June till November. 



90. Aphis Jacob(E(B, Schrank. 



Aphis Jacobace, Schrank, Faun. Boic. ii. 123. 1242; Kalt. 

 Mon. Pflan. 68. 49. 



Found on Senecio Jacobcea in the summer. 



The viviparous wingless female. The body is rather small, oval, 

 convex, deep black : the limbs are also black : the feelers are some- 



