195 
Drepanosiphum acerifolii. Thos. 
Siphonophora acerifolice. Thos. 
Mr. Mon ell, has followed my suggestion as to the possible position 
of this species and is perhaps correct. 
The following in reference genera Callipterus and Chaitophorus and 
the species thereof is copied from Mr. Monell’s paper without note or 
comment. 
CALLIPTERUS. Koch. 
Rostrum short. 
Antennae not on frontal tubercles, or else on very short ones, seven- 
jointed; transition from the sixth to the seventh joint very gradual. 
Nectaries short, often scarcely preceptible. 
Style short, enlarged at apex. 
Wings deflexed; front wings with the stigmal vein much curved, 
not robust, usually more or less hyaline; cubital vein springing fro m 
near the base of the stigma; second discoidal sinuous. 
Hind wings with two discoidals. 
Body elongate, slender, of very pale colors. 
Habits sporadic. 
The genus seems the form a sort of transition between the Aphiclince 
and Lachrnnce, and should be placed in the former section principally 
on account of the shortness of the rostrum. Several divisions of Cal¬ 
lipterus have been proposed, based on the relative length of the sixth 
and se\enth antennal joints, but in such species as I have examined 
this character seems particularly variable and not deserving the im¬ 
portance which has been attached to it. In the species known to me, 
and probably in all European species, the wings are dellexed, but ac¬ 
cording to Fitch the species described by him have the wings hori¬ 
zontal. I was at first inclined to doubt the accuracy of this statement, 
but as it is a character very easy to observe, and as Dr. Fitch men¬ 
tions it on two separate occasions, I do not sec how he could possibly 
aave made a mistake. Further investigation may possibly prove that 
ais species do not appertain to this genus. As I have never been able 
:o find viviparous apterous females, I consider it very probable that 
nsects belonging to this genus acquire wings before producing living 
poung. ° 5 
A. Dorsum of winged individuals with spine-like tubercles 
. . . C. ulmifolii , n. sp. 
AA. Dorsum without spine-like tubercles. 
a. Marginal cell dusky. 
b. Middle tibiae pale yellow. Femora pale yellow 
C. walshii , n. sp. 
