﻿7- /^3^ 

 313. 



CENTROTUS GENISTA. 



Order Homoptera Leach. Fam. Cercopidse Leach. 

 Type of the Genus, Cicada cornuta Linn. 



Centrotus Fah., Cog., Panz. — Membracis Fah., Lat. — Cicada Linn. 



Antenna: inserted in cavities beneatli the margins of the head, 



near the base of the clypeus (4) ; triarticulate, basal joint oblong, 



2nd oval, 3rd subsetiform (4a). 



Lahrum membranous, as long as the basal joint of the labium, 



attenuated to the apex and acute (3). 



Mandibles inclosed in the labium, slender and dilated at the 



base (2*c). 



Maxillce undiscovered. 



Tongue long and very slender. 



Labium as long as the head, not very stout (2) ; triarticulate, 



basal and 2nd joints of equal length, 3rd scarcely shorter oval 



and pilose (2*). 

 Head vertical, transverse, subtrigonate, frequently concealed beneath 

 the thorax. Clypevis forming a lobe. Eyes lateral, very prominent 

 and globose. Ocelli 2 on the crown of the head (1, front view of 

 head). Thorax large gibbous variously formed, produced over and 

 concealing the Scutellum which is bidentate at the apex. Abdomen 

 short, cylindric and conical. Ovipositor contained in a sheath be- 

 neath, half the length of the body. Elytra and Wings dejlexed when 

 at rest, the former subcoriaceous with strong nervures, longer than 

 the body, the latter shorter and membranous icith fine nervures. 

 Legs short, excepting the hinder pair which are formed for leaping. 

 Thighs not very robust. Tibiae, posterior very long and serrated on 

 both sides. Tarsi triarticulate, 2nd joint the shortest in the posterior 

 pair, 3rd a little the longest. Claws strong, short and emarginate 

 at the apex (6, a hind leg). 



Genista Fab. Ent. Sijst. v. 4. p. 15. n. 31.— Panz. 50. 20. 



Dull black, covered with ochreous pubescence, especially the 

 head and thorax, which are excessively thickly punctured, the 

 latter produced in a long spine over the body which is punctured. 

 Elytra shining, pale ochreous, the nervures brown and pubes- 

 cent, the base piceous and punctured, a brownish spot mid-way 

 the costa where the nervures are very dark, and a narrow fim- 

 bria pale brown also. Wings iridescent, the nervures brown. 

 Legs piceous, the posterior tibiae and the apex of the others fer- 

 ruginous : tarsi of the same colour. 

 Obs. This insect is sometimes of a ferruginous brown. 



In the Author's and other Cabinets. 



