MEMBBACIS. INSECTS. 325 



large spot surrounded by a black circle and two central spots; feet 

 pale yellow. 3J inches long. S. America Nouv. Diet. xii. 312. 



TRIBE III. MEMBRACIDES. 



With two ocelli ; antennae of three joints, inserted between the 

 eyes; thorax prolonged behind, covering great part of the 

 back, and in some dilated at the sides of the head. 



I. Scutellum concealed, or none. 



Gen. MEMBRACIS, DARNIS. 



II. Scutellum discovered. 



Gen. CENTROTUS. 



Gen. MEMBRACIS, Lat. Cicada, Lin. 



First two joints of the antennae almost of the same length, the 

 third conico-elongate ; thorax prolonged above the abdomen 

 into a long and pointed scutellum, and dilated on the sides ; 

 legs compressed, with the ridges dentated. 



M. foliata, Lat. Blackish brown ; forehead advanced, flattened ; 

 thorax marked by a band, flattened on the sides, with a pro- 

 jecting arched ridge, which nearly covers the head, and terminated 

 posteriorly in a joint prolonged beyond the abdomen; elytra oval, 

 longer than the wings ; body compressed. Inhabits Surinam. 

 Nouv. Diet. xx. 122. 



TRIBE IV. CICADELL^. 



Thorax dilated laterally ; in other respects not differing from the 

 preceding tribes. 



I. Thorax trapezoidal, prolonged and narrowed posteriorly in the form of a trun- 

 cated aogl >. 



Gen. TTALION, LEDRA, CERCOPIS, PENTHIMIA, (Germ. ;) APROPHORUS, 

 (Germ.) 



I 1. Thorax almost in the form of a segment of a transverse circle, with the poste- 

 rior border straight and rounded laterally. 



Gen. TETTIGONIA, (divided into six other genera by Germar.) 



Gen. LEDRA, Lat. Fab. 



Antennas inserted between the eyes, with the first two joints 

 almost of the same length ; thorax dilated on the sides, with 

 the posterior margin angular, and concave at the base of the 

 scutellum. 



L. aurita, Lat. Greenish brown, dotted with black, and shaded with 

 red ; head very broad, flattened, forming a kind of hood, with 

 three soft points ; thorax with rounded dilated winglets at each 

 side ; under part of the body and feet yellowish green ; elytra 

 transparent, with brown nerves. Inhabits Europe, on the oak. 

 Nouv. Diet. xvii. 431. 



FAMILY IV. HYMENELYTRA. 



Tarsi with two joints, the last generally terminated by two hooks, 

 or vesicular and without hooks ; antennae longer than the 



