State Agricultural Society. 
893 
REMBDIBS. YELLOW-LINED AND RED-LINBD LEAF-HOFPBRS. 
perfect states. They are hereby pernicious to the vegetation on 
which they occcur, as well as by wounding it to insert their eggs. 
The juices of the dahlia appear to be especially palatable to them, 
for they infest this much more than any other of our cultivated 
plants, and unless resisted they are liable to become gathered 
upon this plant in such numbers as to occasion it much injury. 
In seasons when these leaf-hoppers are noticed as being so com¬ 
mon upon our fruit trees and shrubs as to excite apprehensions 
that they will be detrimental, it will be well to frequently shake 
and jar the vegetation on which they abound, in order to frighten 
these insects away; for they are so shy and timorous that I think 
few of them will remain where they find they are liable to be thus 
disturbed, but will fly away to the fields and forests where is vege¬ 
tation that will accommodate them as perfectly as does that of our 
orchards and gardens. When young, small and destitute of wings 
for flight they are less agile than when they are full grown, and 
are more easily captured; and it will be well, the latter part of 
June, to occasionally look over the dahlias and other cultivated 
plants on which any of these young ones are discovered, and pick 
off and destroy them, in company with the young of the Yellow- 
lined Leaf-hopper, which, as stated on a subsequent page, frequently 
occur upon these same plants. 
Yellow-lined Leaf-hoiter, Gypona flavilineata, Fitch. (Ilomop- 
tera, Tettigoniidte.) 
Puncturing the leaves of the dahlia and extracting their juices in July and 
August, a flattened oval pale green leaf-hopper, about 0.40 long, with eight faint 
yellow stripes upon its thorax, the middle ones prolonged upon the head and 
scutel. 
Red-lined Leaf-hoiter, Gypona octolineata, Say. 
An insect similar to the preceding in size, form and habits, hut having tho stripes 
upon its thorax bright red and also the veins of its wing covers. 
These two insects will best be considered in connection, being 
. 7 O 
so ultimately related that they have been regarded as only varieties 
of one species, although to the eyo they differ conspicuously in 
their color, and the ono is common whilst the other is quite rare. 
They wore first noticed by Mr. Say, who in the year 1825 pub¬ 
lished a description of tho Red-lined species in the Journal of the 
Academy of National Sciences, vol. iv., page 340, where he also 
refers to the yellow-lined species as being a variety of the same 
