83 
pale green, antennae and legs pale. Apterous individuals green, sides 
purplish or primrose; honey-tubes short not reaching half way to the 
tip of .the abdomen, black; legs and antennae pale or cinereous. Honey- 
tubes in the winged individuals little more than tubercles. Antennae 
not longer than the body. 
Hyalopterus aqtjileg^e. Koch. 
Very similar to the preceding except that the general color is more 
of a greenish yellow. Will probably be found here on our Aquilegice. 
Section aphidini. 
This section agrees with the preceding in the following characters: 
The front wings have three discoidal veins, the third being twice 
forked; the hind wings are furnished with two oblique veins. The 
antennae are seven-jointed, the third usually the longest, and the 
seventh setaceous and generally next in length to the third. The 
species differ from those of the previous section as follows: The 
antennae, instead of being supported on tubercles, are inserted directly 
on the front of the head; they are generally shorter, seldom exceed¬ 
ing the. body in length, and often, especially in the apterous individ¬ 
uals, being considerably shorter, extending but little beyond the mid¬ 
dle of the abdomen. The size is also usually less, and the legs 
shorter. The honey-tubes are shorter, seldom reaching to the tip of 
the abdomen, in many cases tuberculiform, and sometimes obsolete. 
The tail is usually small and inconspicuous and occasionally wanting. 
From the following sub-family it differs, in having third discoidal 
vein of the . front wings always twice forked. It differs from Lach- 
\nini, in having the antennas always seven-jointed, and the seventh 
joint longer than the sixth, at least it is never shorter. 
The habits of the species are similar to those of Siphonophorini. 
They usually reside on the leaves, twigs or slender stems of plants, 
but affect woody plants, such as trees and shrubs, as well as the more 
succulent. 
In this group, as in the. preceding, all the species (possibly there 
may be one or two exceptions) acquire wings at some time, and the 
rare exceptions are those whose history is but imperfectly known, and 
which doubtless develop winged individuals at some time. 
It is in this group that I think it most likely the dimorphism, of 
which I speak in the introductory portion of this paper, probably 
occurs to the greatest extent in this sub-family. 
Genus SIPHOCORYNE. Pass. 
This genus appears to differ from Rhopalosiphum only in the fact 
hat the antennae are not situated on tubercles as they are in that 
*enus. 
