464 
ANNUAL REPORT OF NEW-YORK 
BUTTERNUT. LEAVES. 
from these pupae the fore part of June. They are long and nar¬ 
row delicate two winged flies, measuring 0.05 to the tip of the 
abdomen and a third more to the end of their wings. They are 
of a rusty reddish color, the thorax darker and the scutel and 
head blackish, this last being separated from the body by a nar¬ 
row pale red neck. The antennae are slender and thread-like, 
half as long as the body, eight jointed, the basal joint thickest 
and as broad as long, the second joint narrower and scarcely 
longer than wide, the remaining joints cylindrical, the fourth 
slightly shorter than the others and the last rather longer than 
those which precede it. Two slender white bristles as long as 
the body are given off from the tip of the abdomen. The wings 
are transparent but not clear and glassy, and their rib-vein is 
very distinct and of a reddish color, ending before it reaches the 
margin of the wing. 
The males of the several other species of the genus Lecanium 
which have been briefly alluded to in different parts of this Report 
will all be very similar to the one now described, differing only 
in their colors, the joints of their antennae, and other minor points. 
AFFECTING THE LEAVES. 
190. Two-marked tree-hopper, Enchenopa binotata, Say. (Homoptera. 
Membracidre.) 
Puncturing the leaves and extracting their juices from July till 
the end of the season, a small rusty brown or black tree-liopper 
with two bright pale yellow spots upon its back, which part is 
prolonged forward and upward into a compressed horn rounded 
at its tip and giving the insect a resemblance to a little bird with 
an outstretched neck, and the four forward shanks broad, thin and 
leaf-like. Length 0.25 to 0.30. 
This may always be found upon the butternut the latter part 
of summer. It occurs also, though less constantly, upon several 
other trees. 
In my catalogue of Homoptera in the State Cabinet of Natural 
History, I referred this insect to the genus Enchophyllum ol 
Amyot and Serville. Mr. Walker, I see, places it in the next 
genus, Enchenopa , of the same authors. It is too similar both in 
