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fifth; tubercles prominent. Honey-tubes extending beyond the tip of 
the abdomen; excessively enlarged in the middle, and expanding at 
the tips in trumpet shape. Fail of moderate length, about one-third as 
long as the the honey tubes, conical. Wings as usual in Siphonophora\ 
fourth vein strongly and regularly curved; second fork about equally 
distant from apex and third vein; stigma elongate, slender and pointed. 
Size rather large. 
General color greenish; tail greenish yellow at the base, darker at 
the tip; body® greenish or pale greenish yellow ; antennae dusky. 
Another winged specimen, probably a male, varies considerably from 
the above description; the second fork of the third vein is very short 
and near the apex, and in some cases is absent in one wing and 
present in the other. Honey-tubes, with the enlargement less than the 
preceding, and carried nearer to the apex; apex with the expanded 
rim. Antenna? also differs slightly in the respective length of the 
joints. Head and abdomen olive green ; thorax and eyes black ; 
antennae dusky ; legs pale, dark at the knees and tarsi. 
Pupa .—Elongate oblong in form ; very pale green, with a dark 
green stripe along the middle of the back, with apparent whitish 
powder sprinkled sparsely over the body. Head whitish ; base of the 
antennae greenish-white, rest pale fuscous, dark at the tips of the joints 
and at the tip of the antennae; eyes brown ; femora greenish-white ; 
tibiae fuscous, tarsi darker. Honey-tubes long, slender, pale at base 
and dusky at the tips. Tail short, coin cal, greenish. 
Although quite a number of these insects were obtained, they were 
never found congregated at one point, but scattered singly over the 
leaves and stems of the tomato plant. Their feet were clogged with 
the viscous fluid which exudes from the plant, so as to give them the 
appearance of being club-footed. 
The winged females were allowed to remain too long after capture 
before being described, hence the color had somewhat faded and is 
not given in detail on this account. My note on these faded specimens 
is as follows : “Legs pale; head dark; prothopax pale, with a fuscous 
streak; disk of the thorax black; base of the abdomen pale, with a 
large dusky spot on the dorsum; antennae dusky. The colors have 
evidently faded.” 
Taken in May, at Carbondale, Illinois. 
Genus MYZUS. Pass. 
Very similar to the genus Aphis in its restricted sense, but in some 
respects closely related to Plwrodon. 
Antennae about equal in length to the body; the tubercles on which 
