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 olf 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. 

 Membracidse.) 



Puncturing the leaves and extracting their juices from July till 

 the end of the season, a small rusty brown or black tree-hopper 

 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 of 

 Amyot and Serville. Mr. Walker, I see, places it in the next 

 genuSj-E?icAe7iqpa, of the same authors. It is too similar both in 



