lIEJIirTER^ 



5G3 



In others, the antennae are at least as lon^ as the head, and often inserted in a notch helow t.h« eyes. 



Aiiotki, Kirby, allied to Otiocerus, and which approaches the preceding in the mode of insertion of the 

 antenna:. [Small exotic insects.] 



As'iraca, Latr. {Delphax, Fab.), has the antenna- inserted in a notch below the eyes, as Innj^ as the head and 

 thorax, with the first joint g:encrally Inn^er than the second, compressed, and angulated; the ocelli are 

 wantinij. [.1. ddvicornis, Latr., a sni.dl, exceedingly active species, and several others, inhabitants of this 

 country.] 



BcJphax, Fab., has the antenn.'E similarly inserted, but not longer than the head, with the first joint much 

 shorter than the second ; the ocelli are present. [Numerous very small species, found by sweeping grass at the 

 sides of roads, commons, &c. Some of the species occasionally have the wing'-covers only partially developed. 

 These constitute the genus Criomorphuf;, Curtis.] 



Derbe, Fabr., are unknown to me, but I presume they come near the preceding insects, and especially 

 to Anotia. 



These compose the genus 



In the terminal Cicadaris the antenna; are inserted between the eyes. 



CiCADELLA (or the Cicad<2 Jianatrcp, Liun.), — 

 A^liich may be thus divided : — ■ 



We commence with the species which, with the exception of a small number, (Ledra^) formerly com- 

 posed tl»e genus Membracis of Fabricius. The head is very much dcf^excd, or low in front, and pro- 

 longed into an obtuse point under llie form of a clypeus, more or loss semicircular. The antennse are 

 always very small, terminated by an inarticulate seta, and hiserted in a cavity under the margins of 

 the head ; the prothorax is sometimes dilated, and horned on each side, and ^irolonged behind into a 

 simple or composite horn, and sometimes it is elevated longitudinally down the back, compressed like 

 a crest, sometimes porrected and pointed in front ; the legs are seldom spiiied. 



[This genus comprises three principal groups, — the Memhracides, Cercopides, and CicadeUincf\. 

 Some [the Memhracides] have no scutellum, properly so called, exposed. 



Membracis, Fab. (having the prothorax elevated, compressed, and leaf-like along the middle of the 

 back}, and 



Tragopa, Latr. (where this part of the body is horned, or pointed on each side, without any intermediate eleva- 

 tion, and posteriorly produced into a point as long as the abdomen), have the tibiae, especially of the fore-feet, 

 foliaceous. 



Iq the following the tibia; are of the ordinary form, and not foliaceous. 



Darnis, Fabr., in which the prolongation of the prothorax 

 is in the shape of a long triangle, covering the wings and 

 abdomen. 

 [ Boc'/diujn, Latr., has the prolonged part narrowed so as 

 ] to expose the wings and sides of the abdomen, and more 

 ■^ or less lanceolate, or spear-shaped. [Such are Bocyd. glo- 

 bidare, and B. cruciatam, two extraordinary Brazilian in- 

 sects, of small size, here figured. The majority of the species 

 of Wembracides are exotic, of small or but moderate size, and 

 amongst them are to be found some of the most anomalous 

 forms.] 



In others the scutellum, although the prothorax is prolonged, is exposed, at least in part, the posterior 

 extremity of the prothorax exhibitmg a transverse suture, which distinguishes it from the scutellum. These 

 form the subgenus Centrotus proper. Types, C. cormita and C. gcnhta. [Two small species, of rather common 

 occurrence in woods in this country, the last of which is figured iu the EntomologisPs Text Book, pi. 3. f. 2.] 



We now pass to the species in which the head is but little lower than, or on the same plane as, the 

 prothorax ; horizontal, or but little deflexed when seen from above, and in which the prothorax is 

 neither elevated in the middle, nor posteriorly prolonged, offering only lateral dilatations, and in which 

 the mesothorax assumes the form of a triangular scutelUmi, of the ordinary size ; the wing-covers are 

 always exposed ; the posterior tibiae are more or less spincd. 



In many, such as the following [which compose the tribe Cercopides'], the thorax has the form of 

 an irregular hexagon, being prolonged and narrowed behind, and terminated by a truncature fitting to 

 the base of the scutellum, and often receiving it ; this truncature being concave, or emarginate. 



^■Efalion, Latr., has the crown of the head transverse, the forehead being suddenly deflexed in front, and the 

 antcnnre are inserted above a line drawn between the eyes. [Brazihan insects.] 



In the three following subgenera the vertex is triangular and bears the ocelli, and the antennae are mserted in a 

 line drawn between the eyes. 



Ledra Fab., has the head very flat between the eyes, like a transverse cl\-peus ; the sides of the prothorax are 



100.— n, Di.c_vdiL 



1 globuln 



