APHIS. 171 



is so named from its being principally found on 

 that well-known plant. It is a rather small species, 

 and is of a green colour, spotted with black: the 

 males are generally winged, and are smaller and 

 more slender than the femahs. 



Aphis Rosce or Rose Aphis is very frequent dur- 

 ing the summer months on the young shoots and 

 buds of roses: its size is nearly similar to that of 

 the Yarrow Aphis, and its colour a bright green: 

 the males are furnished with large transparent 

 wings. 



Aphis TiUie or the Lime-Trees Aphis is one of 

 the most beautiful of the genus. It is of nearlv 



/ 



the same size with the Aphis Rosa?, but of a pale 

 greenish yellow colour, with a row of black, cres- 

 cent-shaped spots down each side of the abdomen, 

 and a black stripe on each side the thorax: the 

 wings are beautifully transparent, with brown 

 nerves or veins, a black edging down the shoulder- 

 part, and several dusky patches toward the tips. 



In the sixth volume of the Transactions of the 

 Linna?an Society of London we find an excellent 

 paper on the subject of these animals by the late 

 ingenious Mr. Curtis. " The leaves (says he) of 

 such trees and plants as have a firm texture and 

 strong fibres, though infested with these ins* 

 preserve their form; but the more tender foliage 

 of others, and flowers in general, cannot bear their 

 punctures without curling up and becoming dis- 

 torted; in consequence of which they lose their 

 beauty entirely and irretrievably. The cultivators 

 of plants, especially in stoves and greenhouses, 



