50 
yond the tip of the abdomen and equal in length to one-fourth the 
body. Legs very long and slender; black, except the basal half of the 
femora which is yellow; the posterior pair is unusually long. The 
wings are comparatively large, of a transparent greenish-yellow tint; 
the sub-costal vein or mid-rib runs close to and strictly parallel with 
the costal vein; the venation very regular, complete and typical, except 
that the third discoidal vein is' sometimes obsolete at its immediate 
base where it connects with the mid-rib. ... ,| 
1 find that there is a variety differing very materially m color, and 
which would probably be taken for a different species. In this variety 
the parts which are red in the other, are of a bright green, the maik- 
ino'S in other respects being alike. I am satisfied it belongs to the 
same species as I find the two colors in the same colony m all stages 
of orowth. The wingless specimens of this variety are also of an ap¬ 
ple °green. The green and red larva? can occasionally be seen min¬ 
gled together in the same colony. . 
The cauda or tail is acute and rather long. The beak reaches near¬ 
ly to the insertion of the posterior legs; is pale at base, the apical 
half dusky. . , 
This species has a very common habit of placing itself on the steins 
of the plant it inhabits with the head downward. 
SlPHONOPIIORA AMEROSIVE. TllOmaS. 
About the first of last September, while in Sioux City, Iowa, I found 
in Great abundance on the leaves and tender stems of Ambrosia pstl- 
ostachya , a species which at the time I supposed to be S. rudbecktae , 
but subsequent examination of the specimens led me to doubt tins 
conclusion and hence I described it as new. 
Similar in size and general appearance to 6 rudbecktae but \ai\ina 
in color from a light brown to a dark seal-brown. The discoidal veins 
of the front wings strongly curved, being much closer together at 
their base than at the margin of the wing; the third obsolete for a 
short distance at its base. Antenna? long, passing the tip of the ab¬ 
domen, light brown, dark at the tip, seventh joint longest, third about 
two-thirds the length of the seventh, the sixth not more than one- 
fourtli the length of the seventh. Honey-tubes long, cylindrical, reach-, 
ino- beyond the tip of the abdomen. Tail long and pointed. I he 
body of the wingless specimen appears to be covered with tubercles 
out of which proceed hairs, some specimens appear to have these hairs 
knobbed at the tip. The winged specimens do not appear to be tubercled, 
but the antenna? have on them alternate hairs which m the specimens 
examined appear under a high power to be knobbed or capitate at the 
tips A similar characteristic has been noticed by Buckton id 
Myzus ribis , a species found on the Red Currant and the Gooseberry 
Honey-tubes dark or the same color as the body; tail yellowish-brown 
Beak dark at the tip reaching to the third coxae. 
Siphomophora rosvE. Reaum. 1 he Rose. Aphis. 
I had hoped that this season 1 would be able to procure sped mem 
of this species, but have been disappointed, only a single specimffl 
4 
