THE ROSE APHIS. $0$ 



Some of the species are constantly and unaltera- 

 bly attached to one or more particular species of 

 plants j but others feed indiscriminately on most 

 sorts of herbage. 



These insects are sometimes winged, and some- 

 times destitute of wings, without any distinction of 

 sex. In the spring they are viviparous, producing 

 the young alive ; and in the autumn they are ovipa- 

 rous, depositing their eggs, like most other insects, 

 in places where they remain secured through the 

 winter till the ensuing spring, when they are 

 hatched. The Aphides afford also another surpri^ 

 sing deviation from the general laws of nature ; 

 one impregnation of the female is sufficient for 

 nine generations. 



Their beak, the"' sheath of which is composed of 

 five joints, is inflected. The antennae are tapering, 

 and longer than the thorax. They have either four 

 wings, or are entirely destitute of them* At the ab- 

 domen there are two obtuse erect horns ; and the tail 

 is sometimes terminated by a small style. 



The larva, chrysalids, and perfect insects, have so 

 little difference, in external appearance, that they 

 cannot be distinguished from each other. 



THE ROSE APHIS * 



This insect, which is well known by the name of 

 Rose-louse, is generally of a green colour ; with the 



* Synonyms — Aphis Rosce; Linn. Gmel.~~ Rose-louse. 

 VOL. III. X 



