October, ’24] ball: names for apple and potato leafhoppers 
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there remains one entire insect and one with the head gone. Three 
elytra show the triangular apical cell. The under wings show the single 
apical cell with a marginal nervure. One specimen shows the forked 
white marking on pronotum, so distinctive. In every way they are 
characteristic of the species. A specimen pinned along side marked 
“Fitch 196” shows all the white markings as commonly illustrated. 
LeBaron (1853) found examples of this species damaging the young 
leaves of the apple and especially young nursery stock and noted that 
they crumble and roll the young leaves. These examples had all the 
white markings distinct and not recognizing Harris’ species, he de¬ 
scribed them as malt. 
Walsh (1862) studied the species of leafhoppers injurious to the apple 
and pear and described the genera Empoasca and Ckloroneura , the for¬ 
mer with a triangular apical cell in the elytra and the latter with a quad¬ 
rangular one. As this character is widely variable in the different ex¬ 
amples of the same species and often on the two elytra of the same 
example, the genus Ckloroneura becomes a synonym of Empoasca. 
Walsh described three new species under each genus. Of these 
Empoasca obtusa Walsh and Ckloroneura abnormis ( = Dikraneura 
abnormis Walsh) have been generally and apparently correctly placed. 
In republishing this paper in the Proceedings of the Boston Society of 
Natural History the next year Walsh notes that E. consobrina is only a 
variety of viridescens as at that time he had all the intermediate grades. 
The only difference mentioned was the venation and a slightly yellowish 
instead of greenish color. As the character of the apical cell is of no 
value and all pale green Empoascas vary to yellowish, this can be ac¬ 
cepted as final. 
E. viridescens is described as:—head right angled, the apex rounding off, 
pale greenish, elytra subhyaline with a greenish tinge. A specimen from 
Rock Island varies in being more yellowish. Length not quite Y in- 
E. consobrina varied only in being sometimes yellowish and slightly over 
y 8 in. in length. Ckloroneura malifica (omitting the variable cell charac¬ 
ter) is described in exactly the same language as that used for viri¬ 
descens with the addition of “or yellowish” and elytra “at their ex¬ 
treme tip cloudy.” Length Y in. Curiously enough these are exactly 
the additions that the consobrina description brings to viridescens with 
one addition,—the cloudy tip,—a character often found in the potato 
leafhopper. There appears to be little doubt that these descriptions 
apply to the same species, the only reason for separating them in the 
first place probably being the unstable generic character. 
