48 Mr. J. Alder on the Animal of Kellia rubra. 



The viviparous winged female. While a pupa it much resembles 

 the wingless female in colour, but is comparatively flat ; when the 

 wings are unfolded it is dark brownish green, and very often 

 slightly covered with white powder : the abdomen is pale green 

 with a very slight pearly tint on its disc ; it has also a black line 

 across each segment, and a row of black spots on each side : the 

 feelers are black, and a little shorter than the body ; the third 

 joint is long and thick ; the fourth is less than half the length of 

 the third ; the fifth is a little shorter than the fourth ; the sixth 

 is shorter than the fifth ; the seventh is about twice the length 

 of the fifth : the eyes are dark brown : the mouth is dull yellow 

 with a brown tip : the nectaries are black, and as long as one- 

 twelfth of the body : the legs are black ; the thighs are pale green 

 towards the base : the wings are colourless, and very much longer 

 than the body ; the wing-ribs are pale yellow ; the wing-brands 

 are very pale brown, and their tips are very slightly clouded ; the 

 second vein diverges more from the first than it does from the 

 third vein ; the forks of the latter usually begin respectively before 

 one-third and before two-thirds of the length of the vein ; the 

 fourth vein is curved moderately and equally throughout its 

 length ; the angle of the brand whence it springs is distinct. 



1st var. Greenish yellow varied with brown. 



2nd var. The feelers are as long as the body. 



3rd var. The mouth is green with a black tip : the thighs are 

 wholly black. 



4th var. The thighs and the middle shanks excepting the tips 

 are pale yellow. 



Length of the body 1 line ; of the wings 3 lines. 



Most of the winged race die during the growth of their pro- 

 geny, and adhere to the leaf at a short distance from the groups of 

 the wingless insects. This species feeds also on Brassica Rapa, B. 

 campestris, B. Napus, Sinapis arvensis, S. alba, S. nigra, Crambe 

 maritima (on this plant, especially in a wild state, it occurs 

 in great profusion), Raphanus sativus, R. Raphanistrum, Capsella 

 Bursa, Diplotaxis tenuifolia, Lepidium sativum, Thalictrum minus, 

 Spinacia oleracea. 



[To be continued.] 



VIII. — On the Animal of Kellia rubra. 

 By Joshua Alder, Esq. 



To Richard Taylor, Esq. 



DEAR SlR, Newcastle-upon-Tyne, 18th June 1849. 



My remarks on the animal of Kellia rubra have unfortunately 

 brought me into a controversy with Mr. Clark, a gentleman with 

 whom it would have given me much greater pleasure to have 



