CLASS V. IKSECTA. 231 



Sp. 1. Cer. xanguinoknta. Black, shining; each wing-case with a spot 

 at the base, one in the middle, and a flexuous l)and at the apex blood 

 red. {PL 5. fg. 1.) 

 Cicada sanguinolenta. Liim. Cercopis sanguinolenta. Fabr., Leach. 

 Inhabits France, Germany, and England in the woods of Kent. 



Genus 299. LEDRA. Fabr., Latr., Leach. Cicada. Linn., Geoff. 

 Membracis. Oliv., Lamarck, Sch7anh. 

 Antenna inserted in the frontlet, the two first joints nearly equally 

 long; the third elongate-conic : thorax dilated behind into an auricle. 

 Sp. 1. J^ed. aurata. 

 Inhabits the oak and various trees in woods. 



Genus 300. MEMBRACIS, Latr., Fabr., Leach, (^icada. Liu/i. 

 Antenncc inserted in the frontlet; the two first joints nearly equally 



long, the third elongate-conic : thorax dilated behind. 

 Sp. 1. Mem. cornidus. Brownish. 



Cicada cornuta. Linn. Membracis cornuta. Latr., Leach. 

 Inhabits woods and hedges. 



Stiiu'S 4. — Antenna inserted between the eyes: thorav transverse, 

 hinder margin straight. 



Genus 301. lASSUS. Fabr., Leach. Tettigonia. Latr., Oliv., 

 I^amarck. 

 Front broad, not longer than broad, on each side above the insertion of 



the antennae produced into an angle. 

 Sp. 1. lass. Lanio. Fabr. 

 Inhabits England and other parts of Europe. 



Genus 302, TETTIGOMA. Oliv., Lamarck. Cicada. Linn., 

 Fabr., Latr., Leach. 

 Front elongate-quadrate, the apex truncate, convex, thickened. 



Sp. 1. Tet. viridis. 

 Inhabits moist places. 



Fam. III. Psyllid.t:. Latreille, Leach. 



Tarsi with two joints distinct: antenna with ten or eleven joints, the 



last with two setas : legs formed for leaping. Both sexes with wngs. 



Genus 303. PSYLLA, Geoff, Oliv., Lam., Latr., Leach. Chermes. 



Linn., De Geer, Fabr. 



Antenna filifonn or slightly setaceous, as long as the body: thorax with 



the anterior margin arcuate. 

 Sp. 1. P.sT/l. Alni. Green-yellowish; anterior segment of the thorax, 



squamula of the elytra, and ner\'ures, green. 

 ( hermes Beuda? Alni. Linn. Chermes Alni. Fabr. Psylla Alni. Latr.y^ 



Leach. 

 Inhabits the alder. 



