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dividuals; usually the head is somewhat paler than the thorax which 
is more or less tinged with olive; the central portions of the abdomen 
paler than the sides which are dark brown; tip of the abdomen, and 
a space around the base of the honey-tubes black or blackish. Legs 
mostly transparent yellow. Beak of medium length, scarcely reaching 
the hind coxse. 
Found at Carbondale in June and July. 
Apiiis vernoni^e Thos. The Iron weed Aphis. 
This pretty Aphis is very abundant during the summer on the un¬ 
derside of the leaves of the ironweed [Vernonia fasciculata), causing 
them to curl downwards and inwards at the sides ; it also moves on 
to the tender stem when abundant, and later in the season is found 
chiefly on the pedicels, or flower stalks, giving to the heads a black¬ 
ened, sooty appearance, causing the flowers to fade and the -head ul¬ 
timately to wither and die. It is sometimes so abundant that its ef¬ 
fect may be observed, over a large area thickly covered by this weed, 
at a glance. 
I found it at Carbondale from June to August, and at Fort Dodge, 
Iowa, about 1st September ; at the latter place it was, at the date 
mentioned, confined wholly to the heads. A pretty, bright, lemon- 
yellow species. 
Winged individuals (probably females).—Length of body about .06 
to .08 of an inch ; to tips of wings .12 of an inch. General color 
bright yellow ; abdomen bright lemon-yellow ; thorax yellow, except 
the raised lobes, which, with the insertions of the front wings, are 
more or less dusky or brownish, in some specimens quite dark, in 
others pale. Antennae about two-thirds the length of the body ; hon¬ 
ey-tubes slender, cylindrical, and reaching nearly to the tip of the ab¬ 
domen ; tail distinct, but short and blunt. The antennae and honey- 
tubes are generally pale, the latter are sometimes ochreous, the tail 
yellowish or whitish; legs pale. The wings typical in venation, trans¬ 
parent, with a slightly smoky appearance; veins dark; a few specimens 
of the many examined had the wings clear, but as a rule the fuliginous 
or smoky appearance is very distinct; the second fork of the third 
discoidal vein is very near the tip and is very short. 
Wingless individuals .—Almost uniformly greenish-yellow; eyes black; 
honey-tubes ochreous; tail whitish. 
Sometimes the head, thorax, honey-tubes and tail of the winged 
specimens are darker than represented. 
This appears to be very closely related to and probably identical 
with A. beecabungce , Koch, which infests a species of Veronica in 
Europe; but I have concluded it best to consider it as distinct until 
identity has been established by better evidence than I have at present. 
Aphis cephalanthi. Thos. The Button-bush Aphis. 
This species is found on the stem or twig of the present year’s growth, 
and sparsely along the mid-rib of the leaf near the base; and usually, 
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