HEMIPTERA. 41 
Oriocrrus, Kirb. 
Or the Cobax of Germar, which hitherto seems to be peculiar to 
the western continent(1). 
Those, in which the head presents no remarkable projection, com- 
pose various genera of Fabricius, to which must be added some 
others established since the time of that naturalist. 
Sometimes the antenne are shorter than the head, and inserted 
out of the eyes, a character which is also common to the two pre- 
ceding genera. 
Here :  oepae lang two very apparent ocelli. 
Lystra, Fab. 
These Insects at the first glance resemble little Cicadz, properly 
so called. ‘The body and elytra are elongated. The second joint 
of the antennz is almost globular and granose, as in the Fulgore(2). 
Crxivs, Lat. 
The Cyxii resemble the Lystrz, but the second joint of the antennz 
is cylindrical and smooth(3)._ 
Under the generic appellation of 
+ TETTIGOMETRA, Lat. 
I have separated certain Insects analogous to the preceding spe- 
cies, but in which the antennz are lodged between the posterior and 
lateral angles of the head, and those of the anterior extremity of 
the thorax. The eyes are not prominent(4). 
There, we observe no ocelli. . 
Those species that have large élytra, and in which the prothorax 
(1) Lin. Trans., XII, O. Coguebertii, 1, 14 and I, 8;—genus Cobax, Germ., Ma- 
gas. der Entom., IV, p. 1, et seq. 
(2) Fab., Syst. Ryngot., p. 56;—Lat., Gener. Crust. et Insect., II, p. 166. 
(3) Lat., Ib. Fabricius places them among his Flata. The Achili of M. Kirby— 
Lin. Trans., XII, xxii, 13—differ but little from the Cixii. . 
(4) Lat., Gen. Crust. et Insect., III, p. 163;—Germ., Magas. der Entom., IV, 7. 
The Czlidie of this author—Ib., p. 75—seem to approach the Tettigometrz. 
’ They have the same port, and, according to him, their antennz are inserted under 
the eyes. 
Vou. IV.—F 
