HEMIPTERA. 43 
In the last of the Cicadariz, the antenne are inserted between the 
eyes; they compose the genus 
CicapDELLA.—Cicada ranatra, Lin. 
Which may be thus subdivided: 
We will begin with those species, the Ledre excepted, which for- 
merly composed the genus Mremsracis of Fabricius. Their head is 
strongly inclined or lowered anteriorly, and prolonged into an obtuse 
point, or in the form of a clypeus, more or less semicircular. The 
antenne are always very small, terminated by an articulated seta, 
and inserted into acavity under the margin of the head. The pro- 
thorax is sometimes dilated and horned on each side, prolonged and 
narrowed posteriorly into a point or spine, either simple or com- 
pound, sometimes elevated longitudinally along the back, compressed 
into a kind of edge or crest, and sometimes projecting and pointed 
anteriorly; the legs are scarcely spinous. 
Some have no apparent or exposed scutellum, properly so called. 
Here, the tibia, the anterior ones particularly, are strongly com- 
pressed and foliaceous. The top of the head always forms a sort 
of semicircular clypeus. 
’ 
« 
Mempracis, Fab. 
Where the prothorax is elevated, compressed and foliaceous along 
the middle of the back(1). 
Tracopa, Lat. 
‘Where that part of the body presents, on each side, a horn or 
pointed projection without any intermediate elevation, and is pro- 
longed posteriorly into an arched point of the length of the abdo- 
men, and replacing the scutellum(2). 
There, the tibiz are of the ordinary form or non-foliaceous. 
Darnis, Fab. 
Where the posterior prolongation of the prothorax covers the top 
(1) The Membracis foliaceus, Fab. 
(2) Membraces from the Brazils, which appear to me to be analogous to the 
following species of Germar, glabra, albimacula and xanthocephala. 
