86S [Assembly 
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legs into a distinct genus under the name Cinara. But we 
have certain American species inhabiting the leaves of the 
hickory, 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 
the rank of an independent genus. Having the last joint of 
the antennae shorter than that which precedes it, they would be 
included in the last section of M. Amyot’s arrangement, the type 
of which is the Aphis 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 
could be discovered with a lens, which tube appeared to be re¬ 
tracted and became imperceptible soon after. Their secretion pf 
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 being met with upon the same leaf, and these are scat¬ 
tered upon its under side, chiefly along the sides of the midvein, 
in the angles 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 antennae, and 
their legs and wings are frequently varied with black or brown 
marks, which are much more clear and distinct than is usual in 
this family, the species of which, Linnaeus well remarks, are diffi¬ 
cult to distinguish and more difficult to describe. That which is 
