176 INSECTA. 



the elytra, hardly longer than the abdomen, or shorter, arc dilated at 

 their base, and afterwards narrowed, form another siibgenns, the 



H' Issus, i^a6.* 

 Sometimes the antennae 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 antennae f . 



AsiRAcA, Lat. — Delphax, Fab., 



Where the antennae 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 p 



'■ Delphax, Fab., 



Where the antennae 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 §. 



^ ' Derbe, 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 Cicadariae, the anntennae are inserted between the 

 eyes ; they compose the genus 



^ CrCADELLA. — <^ICADA RANATRA, Lin., 



Which may be thus subdivided : 



We will begin with those species, the Ledrae excepted, which for- 

 merly composed the genus -Membracis 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- 

 tennae 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 tibiae, the anterior ones particularly, are strongly com- 

 pressed and foliaceous. The top of the head always forms a sort of 

 semicircular clypeus. 



* Lat., Gen. Cnist. et Insect., Ill, p. 1C6 ; Fab., Syst. Ryng., p. 199 



t Lin. Trans,, XIII, pi. i, fig. 9, 10, 11, 15. 



+ Lat, lb., p 167. 



§ Lat., Gen. Crust, et Insect., Ill, p. 168. 



