Length to tip of abdomen about .05 ; to tip of the wings about .12 
inch. 
Found in July, at Carhondale, Illinois, on the new growth of the 
twigs or stems of young plants of G phalanthus occidentalism occasion- 
ally on the midrib of the leaf near the base. 
It is possible that this should be placed in Callipterus , but the honey- 
tubes are rather long, and the antennae do not agree with characters 
as given by Koch, which, in fact, appear to be contradictory. 
33. Aphis viburni ? Fabr., Syst. Ent., 737, 18. 
On the tender twigs of Viburnum opulus. 
Our species appears to be identical with the European. 
General color lilac-brown ; antennae shorter than the body ; the 
honey-tubes short ; legs usually pale honey yellow. Illinois, J une. 
34. Aphis maidis, Fitch. 
On the tassel, ear-stalks and roots of Indian corn. Green through- 
out in apterous individuals ; winged with head and thorax shining 
black. 
35. Aphis brassicae, Linn., Syst. Nat., II, 734. 
Aphis floris-rapae, Curt., Journ. Roy. Agr. Soc., Ill, 55. 
Pale greenish-yellow. On Cabbage. 
36. Aphis impatientis, new sp. 
Winged individual. — Antennae extending about to the base of the 
honey-tubes, pale and dusky alternately ; head black ; prothorax pale 
brown, rest of the thorax shining black ; abdomen pale brownish ; 
honey-tubes not reaching the tip of the abdomen, black ; tail dull yel- 
lowish ; veins of the wings and stigma brown ; wings iridescent ;, legs 
dusky, tibiae pale yellow. Length to tip of abdomen about .10 inch, 
to tip of wings .18 inch. 
Apterous specimens. — Olive or purplish-brown. 
Found in August, at Carbondale, Illinois, on Impatiens fulva. 
Is an Aphis in the restricted sense. 
37. Aphis symphoricarpi, new sp. 
Apterous individuals — "No winged specimens observed). 
There appear to be two varieties, but evidently belonging to the 
same colonies. 
One is pale, transparent green or yellowish green ; eyes black ; an- 
tennae pale, with a black ring a little beyond the middle, tips dusky ; 
honey-tubes and a small space around the base ochre yellow ; tarsi and 
tip of the beak black ; legs pale, transparent greenish. Bodies rather 
