198 
Callipterus discolor, n. sp. 
Winged form —Abdomen greenish or yellowish, with four rows of 
irregular brownish spots, often with smaller dots between them, the 
two middle rows lecoming confluent just above the nectaries. An¬ 
tennae with the sixth joint less thau the seventh. Wings with irregu¬ 
lar dusky bands arranged similarly to those in C. asclepiadis. Length 
1.77mm; to tip of wings 3.29mm. 
Under side of leaves of Quercus bicoler. St. Louis, Mo., May. 
Callipterus punctata, n. sp. 
Wi?iged form —General color pale yellow; abdomen with faint dusky 
shadings, representing the dots of the preceding species. Sixth joint 
of the antennae much less than the seventh. Wings hyaline, except 
dusky markings at the tips of the second discoidal, cubital, and stig- 
mal vein, and a dusky mark at base of stigmal vein. Length 1.52— 
1.77mm; to tip of wings 3.04—3.29mm. 
On the under side of leaves of Quercus bicolor. May—June, St. 
Louis, Mo. It is possible that this is merely a variety of C. discolor , 
but I have never succeeded in finding intermediate forms. 
Callipterus hyalinus, n. sp. 
tv J 
Winged form —General color pale yellowish. Apterous individuals 
with the usual capitate Lairs. Seventh joint of the antennae longer than 
the preceding. Wings hyaline, without any markings, or with a 
scarcely perceptible shading at the tips of the wings. Stigma rather 
long, the distance between the base of the stigmal vein and the base 
of the cubitus being much greater than that between the tips of the 
lower forklet and lower cubital branch. Basal two-thirds of the stig¬ 
mal vein subhyaline. Second discoidal not so much curved as in C. 
punctata. Length 1.77—2.02mm; to tip of wings 3.04mm. 
On the under side of leaves of Quercus imbricaria , to which species 
I believe it is confined. May—June, Saint Louis, Mo. 
\W 
Callipterus betul^colens, n. sp. 
Aphis betuloecolens? , Fitch, N. Y. Catl. Horn. p. 66. 
Winged individuals —General color yellow; antennae, first and sec¬ 
ond joints entirely yellow, the apical half of the remaining joints 
more or less dusky. Dorsum uniform yellow, without tubercles; wings 
