28 MISCELLANEOUS COTTON INSECTS. 
"Aphis cichorii" (A]?his intybi Koch), and his descriptions hardly 
distinguish the two species, the main differences being the smaller size 
of medicaginis and the coloration of the antenna? and legs. In colora- 
tion of the legs the apterous females of our specimens resemble medi- 
caginis, but the coloration of the antennae is like that of cichorii. The 
size is difficult to determine from Koch's figure. It appears probable 
that Aphis medicaginis Koch is synonymous with A. cichorii Koch 
(A. intybi), but as it is practically impossible to determine this with- 
out the t} T pes, and as the name medicaginis has heretofore been used 
in American literature, it seems best to retain it. 
For those who are unable to refer to Koch's description it is here 
given : 
Head, neck, and body black, legs yellowish white, the points of the femora, tibiae, 
and tarsi, black. Honey tubes somewhat long and black. The middle joints of the 
antennae yellowish. This form is very closely related to and hardly distinguishable 
from A. cichorii. It is smaller, and is the smallest of the species which have yet 
come to my notice. The winged insect has the same colorings as A. cichorii, except 
that the two middle segments, namely the fourth and fifth [evidently of the antennse — 
E. D. S.], are yellowish, and the stigma of the front wing is smoky brown, darker 
on the margin, approaching yellow toward the base. 
The wingless mother is hardly larger than the winged, though a little broader, not 
as broad, however, as the same form of A. cichorii. She is dark brown above and 
below, on the back somewhat blackened. Honey tubes and style black. Antennae 
and legs yellowish white. The two end joints and the three shorter basal joints of 
the antennse, as well as the points of the femora of the third pair of legs, and the 
points of the tibiae and tarsi of all the legs, black. The points of the femora of the 
second pair grade into brown at the tips. The coxa? grade into smoky brown. The 
whole insect has very little glossy appearance. Only the back part of the abdomen 
shows itself somewhat flattened, and with a short brilliant gloss. 
The host plant is Medico go fulcdta ; the aphis appears on this in very large numbers, 
congregating in millions. They colonize on the twigs, and more seldom down on the 
leaves. The winged forms readily make their escape when they notice danger. — 
(Translation of C. E. Sanborn.) 
The species was first noticed in this country at St. Louis, Mo., in 
July by Monell/' who gives its food plants as Caragana arborescens, 
JRobinia viseosa, and Melilotus italica. Monell notes the shining black 
dorsum, which agrees better with our description than that made by 
Koch, who states that it is glossy onl} r for a short distance on the 
abdomen. This character is noted also b} T Thomas. 6 The species is 
also mentioned by CEstlund in his Aphidida? of Minnesota (p. 69), and 
by Osborn in his Catalogue of the Hemiptera of Iowa/ In a paper on 
the Hemiptera of Colorado d Cohen notes it on Astragalus bisulcatus, 
principally in the racemes of the flowers, and on GJycyrrhiza lepidota. 
«1879: Bui. U. S. Geol. Survey, Vol. V, No. 1, p. 24. 
& 1895: 8th Rep. State Ent. 111., pp. 100-192. 
^1892: Proc. Iowa Acad. Sci., Vol. 1, p. 129. 
tf 1895: Bui. 31, Colo. Agric. Exp. Sta., p. 120. 
