196 
bb. Tibiae black. Apical portion of femora black 
C. bella (Walsh). 
aa. Marginal cell hyaline. 
b. Wings with transverse, shaded bands. 
c. Abdomen with conspicious dusky spots C. discolor, n. sp. 
cc. Abdomen yellow, concolorus, or with very faint trans¬ 
verse bands C. asclepiadis , n. sp. 
bb. Wings subhyaline. 
c. Nectaries distinct. 
d. Dusky shadings at tips of veins; a dusky mark at base 
of stigmal vein. C. punctata, n. sp. 
dd. Wings hyaline. 
e. Apical joint of antennae a little longer than the sixth. Veins 
whitish. 01 hyalinus, n. sp. 
ee. Apical joint of antennae three times as long as the sixth. 
First and second discoidals black O. betulcBcolens, n. sp. 
cc. Nectaries not perceptible. 
d. Wings hyaline. 
dd. Veins bordered with brown. 
0. caryce n. sp. 
O. guercicola n. sp. 
Callipterus ulmifolii. n. sp. Pale whitish-yellow. 
Apterus individuals— Tubercular, with capitate hairs, which disappear 
when the insect acquires wings. 
Winged individuals —Antennae as long as the body ; third, fourth 
and sometimes the fifth joint slightly dusky at apex; apical joint a very 
little longer or shorter than the sixth. Wings hyaline; all of the 
veins, and especially the stigmal vein, subhyaline. Dorsum with four 
long, spine-like tubercles on its basal portion, and with various shorter 
tubercles on the apical portion. Length 1.7 7mm; to tip of wings 
3.04mm. 
On the under side of leaves of TJlmus americana, May—June. 
Closely allied to the European C. quercus, which has also four dorsal 
tubercles, v 
Caliupterus walshii. n. sp. 
* vm 
A 
Winged form— \>right yellow. Antennae, with the tips of joints 3 
to 6, black; seventh joint more than twice as long as the preceding. 
Thorax with a lateral black vitta extending from the eye to the wing- 
insertions. Femora pale whitish-yellow; fore tibiae black, middle tibiae 
faintly dusky; hind tibiae more duky than the middle pair, larsi and tips 
of tibiae black. Nectaries yellowish, half as long as the tarsi. M ings 
hyaline. Front wings with the entire costa as well as its. nervures 
black to the tip of the stigma, whence there extends a marginal dusky 
vitta, as wide as, or a little wider than, the costa at base and middle, 
but tapering at the tip and extending a little beyond the upper furcal 
of the cubitus. The stigmal vein lies entirely in this vitta, and cuived 
