164 HICKORY. LEAVES T.ITTLE HICKORY APHIS. 



legs into a distinct genus under the name Cinara. But we 

 have certain American species inhabiting the leaves of the 

 kickory; oak, and high cranberry, which differ so much both 

 in their form and habits from the general character of these 

 insects, that they will probably be regarded as entitled to 

 ttie rank of an ind«jpendent genus. Having the last joint of 

 Mie antennse shorter than that which precedes it, they would be 

 included in the last section of M. Amyot's arrangement, the type 

 ©f which is the Jiphis Tilice. But, from specimens of this species 

 received from Dr. Signoret of Paris, and the descriptions given of 

 it by M. Fonscolomb and others, our American insects differ in 

 several important points. Their wings are not elevated in the 

 usual steeply inclined manner but are laid flat upon the back in 

 a horizontal direction ; their bodies are strongly depressed ; their 

 nectaries are merely pores without any perceptible elevation, 

 though in one instance, examined when a globule of honey dew 

 was protruding, the end of an exceedingly short cylindrical tube 

 eould be discovered with a lens, which tube appeared to be re- 

 tracted and became imperceptible soon after. Their secretion of 

 honey dew appears 'to be quite limited as compared with 'other 

 aphides,. nor do they extract a sufficient amount of juices from 

 the leaves to cause any very perceptible distention of their flat- 

 tened abdomens. . They do not remain fixed to the leaves with 

 their beaks inserted therein, but are wandering over its surface 

 much of the time, nor do they live in societies like other aphides, 

 only a few beipg met with upon the same leaf, and these are scat- 

 tered upon its under side, chiefly along the sides of the mid vein, 

 in the tingles where the lateral veins are given off from it. Ants, 

 moreover, are never met with accompanying them. 



These aphides are smaller and of a more tender delicate ap- 

 pearance than their kindred. Most of the species are of a pale 

 yellow or white color, with black rings upon their antenna, and 

 their legs and wings are frequently' varied with black or brown 

 marks, which are much tnore clear and distinct than is usual in 

 this family, the species of which, Linnseus well remarks, are difii- 

 eult to distinguish and more difficult to describe. That which is 



