176 INSECTA, 
the elytra, hardly longer than the abdomen, or shorter, are dilated at 
their ate. and afterwards narrow ed, form pemeuier subgenus, the 
Issus, Fab. o& 
Sometimes the antenne are at least as long as the head, and most 
frequently inserted into an inferior emargination of the eyes. 
Anotia, Kirb., 
Which in a natural order comes near his Otiocerus,and approximates 
to Issus in the insertion of the antennee +. 
Astraca, Lat—Dertrnax, Fab., 
Where the antenne are inserted into an inferior emargination of 
the eyes, are as long as the head and thorax united, and have their 
first joint usually longer than the second, compressed and angular. 
There are no simple eyes t. 
De.ruax, Fab., 
Where the antenne are inserted in a similar manner, but are never 
much longer than the head ; the first joint is much shorter than the 
following one, and without ridges. The simple eyes are apparent §. 
Derse, Fab. 
These Insects are unknown to me; I presume, however, that they 
approach those of the preceding subgenera, that of Anotia in parti- 
cular. 
In the last of the Cicadariz, the anntenne are inserted between the 
eyes; they compose the genus 
CICADELLA.—CICADA RANATRA, Lin., 
Which may be thus subdivided : 
We will begin with those species, the Ledrz excepted, which for- 
merly composed the genus Memsracis of Fabricius. Their head is 
strongly inclined or lowered anteriorly, and prolonged into an obtuse 
point, or in the form of aclypeus, more or less semicircular. The an- 
tenne are always very small, terminated by an articulated seta, and 
inserted into a cavity under the margin of the head. The prothorax 
is sometimes dilated and horned on each side, prolonged and nar- 
rowed posteriorly, into a point or spine, either simple or compound, 
sometimes elevated longitudinally along the back, compressed into a 
kind of edge or crest, and sometimes projecting and pointed an- 
teriorly ; the legs are scarcely spinous. 
Some have no apparent or exposed scutellum, properly so called. 
Here, the tibize, the anterior ones particularly, are strongly com- 
pressed and foliaceous. The top of the head always forms a sort of 
semicircular clypeus. 
* Lat., Gen. Crust. et Insect., III, p. 166; Fab., Syst. Ryng., p. 199 
+ Lin. Trans., XIII, pl.i, fig. 9,10, 11, 15. 
{ Lat:, Ib4p 67. 
§ Lat., Gen. Crust. et Insect., III, p. 168. 
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