199 
hyaline; costal and subcostal veins whitish; first and second discoidals 
black. Stigma yellowish; basal two-thirds of the stigmal vein obsolete; 
apical portion hyaline, subobsolete. Nectaries yellow, a little fuscous, 
fully as long as the tarsi. The rostrum barely reaches the middle 
coxae. Length 2.02mm; to tip of wings 3.81mm. 
On the under side of birch leaves. June, Saint Louis, Mo. 
Dr. Fitch’s description of A betulcecolens is not sufficiently exact to 
enable one to recognize the species. It is, however, probable that it 
is distinct, as the measurement he gives would make his species 
slightly larger than the present one; besides, were they identical, it 
would be rather singular that Dr. Fitch should omit to mention the 
obsolete stigmal vein, and at the same time be at the pains to men¬ 
tion that the base of the cubitus was hyaline. 
I am unacquainted with Calaphis betulella Walsh; but unless there 
are other distinguishing characters, the mere absence of the stigmal 
vein will not be sufficient to separate Calaphis from Callipterus , as 
there is a complete series of transitions between the two. a. 
Callipterus cary..e, n. sp. 
Winged form —General color, pale yellow; tips of the antennal 
joints black; legs entirely pale whitish. Antennse a little shorter 
than the body; seventh joint equal to or one-third longer than the 
preceding; fifth joint as long as the two following, taken together. 
Nectaries not perceptible. Rostrum not reaching to the middle coxte. 
Wings hyaline; veins pale; stigma rather short and blunt at apex. 
Stigmal vein subobsolete,its course being only traced with difficulty. The 
distance between the apex of the lower cubital branch and that of the 
second discoidal equal to about one-half the distance between the 
apices of the first and second discoidals. Apterous viviparous females 
and pupae with four longitudinal rows of tubercles, each mounted 
with a capitate bristle. 
I 
Callipterus? quercicola, n. sp. 
NY Winged from —Antennae about half as long as the body; not moun¬ 
ted on frontal tubercles; remote at base; third, fourth, and fifth joints 
equal in length; transition from the sixth to the seventh joint exceed- 
ingly gradual; seventh joint about half as long as the preceding. 
Rostrum short, not reaching the second coxae; apical joint very acute. 
Nectaries reduced to mere openings. Style none. Wings with the 
veins bordered with brown. Stigma rather short, and blunt at apex; 
the cubital vein arising from its base. Stigmal vein not so much 
curved as usual in this genus, not hyaline; distance between the base 
of the cubitus and that of the stigmal vein equal to the distance be¬ 
tween the furcals and less than the distance between the base of the 
cubitus and that of the second discoidal. Second discoidal not sinu- 
