49 
In the living winged specimens, the dusky expansions of the veins 
show very prettily, and the stigma appears to be transparent in the 
central part with a broad dark border encircling it behind. 
When in motion, these insects are more active than usual, moving 
quite rapidly and often taking quite distinct leaps, yet their hind legs 
are not unusually elongated. Slightly above medium size, but less than 
iS. rudbeckim. 
Although these insects are not numerous on any one leaf—the 
young sometimes forming small colonies, but adults always scattered— 
yet the effect of their operations is often very apparent, giving the 
leaves a shriveled or sickly appearance. It is possible therefore that 
this species may, under favorable circumstances, develop to such an 
extent as to seriously injure the Soft Maples so common in the Northern 
and Middle portions of our state. 
Insect enemies .—I find preying upon this species the larva of a 
Syrphus fly, which I have been unable to trace to the perfect state. 
It is of a greenish color, the front portion pale, whitish at the imme¬ 
diate front and becoming greener backwards, the hinder portion being 
quite green, shaded with fuscous. There is a row of tubercles along 
each side near the stigmatic line, one tubercle on each segment, from 
which arises a black hair; there are also besides these, three longitu¬ 
dinal rows of black hairs, one median and one on each side between 
the median line and line of tubercles—one hair in each row to each 
segment. 
This plant-louse appears to be quite distinct from Aphis aceris Linn, 
which according to Dr. Fitch occurs on Acer Pennsylvanicum. 
SlPHONOPHORA RUDBECKKE. Fitch. 
I have had an opportunity during the past summer of examining a 
large number of specimens of this species in all stages. It appears to 
be very closely allied to if not identical with At solidaginis of Fabri- 
cius and other European authors, the color of the thorax of the win¬ 
ged specimens presenting the only perceptible difference. 
I find it not only on the Golden rod, and the Rudbeckia laciniata 
but also on the Rag-weed (Ambrosia trifda ,) and often in immense 
numbers on the flower stalks and tender stems. It is quite common in 
Illinois. It is very active and often wanders off to other plants besides 
those which it usually attacks, but so far I have failed to observe it 
on any useful plants. 
Winged viviparous female .—Size very large, the length of the body 
varying from .12 to .14 inch; to the tips of the wings'.20 inch. Body 
of a dull orange red or pale reddish brown color thoughout. Antenna}, 
eyes, honey-tubes and legs (except the base) black.' Antenna? long, 
tapering, the length slightly exceeding that of the body, of a dusky 
black throughout except the basal joint and tubercle, which are of the 
same reddish color as the body; when examined with a microscope 
they are found to have strong hairs on them which appear to be placed 
alternately on opposite sides somewhat regularly; the seventh joint 
much longer than the sixth, the sixth not more than half the length 
ot the fifth. Honey tubes long, cylindrical and black, extending be- 
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