2246 Insects. 



Descriptions of Aphides. By F. Walker, Esq. 



(Continued from page 2221). 



Aphides on the Corn Marigold (Chrysanthemum segetum). 



Aphis Sonchi, var. ? 



The wingless viviparous female. This is a pale brown variety of Aphis Centaureae. 

 The body is oval, convex, smooth, shining, and has a metallic tinge above : there is a 

 rim on each side of the abdomen ; its back is sometimes tinged with green, and its tip 

 beneath is black : the antennae are black and as long as the body : the rostrum is 

 black : the tip of the abdomen and the tubes are pale yellow ; the latter are black at 

 the base and at the tips, and are rather more than one-fourth of the length of the 

 body : the legs are long and pale yellow ; the coxa?, the tarsi, and the tips of the thighs 

 and of the tibiae , are black. 



Aphis Dianthi ? 



The wingless viviparous female. The body is small, pale green, oval, convex, 

 shining : the antenna? are pale yellow and much longer than the body ; the tips of the 

 joints are black : the rostrum is pale yellow ; its tip and the eyes are black : the tubes 

 are also pale yellow, with black tips, and as long as one-third of the body : the legs 

 are long and pale yellow ; the knees, the tarsi and the tips of the tibiae are black. 



The winged viviparous female. This, while a pupa, is grass-green and nearly 

 linear : the head is pale green. 



It feeds also on the scarlet pimpernel (Anagallis arvensis). 



Aphis persola. 



The winged viviparous female. While a pupa the body is small, elliptical, rather 

 flat, pale green, and slightly mottled with darker green : the antennae are black, pale 

 yellowish green towards the base, and nearly as long as the body : the rostrum is pale 

 yellow ; its tip and the eyes are black : the tubes are pale green, with black tips, 

 slightly spindle-shaped, and as long as one-sixth of the body : the legs are pale green ; 

 the tarsi and the tips of the tibiae are black. 



It feeds also on the scarlet pimpernel (Anagallis arvensis). 



Aphis Dianthi? 



The winged viviparous female. While a pupa it is pale, sometimes streaked with 

 black, and slightly tinged with green : the antennae are black, yellow at the base, and 

 as long as the body : the rostrum is yellow ; its tip and the eyes are black : the tubes 

 are yellow, with black tips, and about one-fifth of the length of the body : the legs are 

 yellow ; the knees, the tarsi and the tips of the tibia? are black. In the winged state 

 it is black : the abdomen is dark yellowish green ; its disk is almost, and it has 

 a row of black dots on each side : the antennae are a little longer than the body ; the 

 base of the third joint is pale yellow : the rostrum is pale yellow, with a black tip : 



