CLASS V. INSECTA. 229 



This species is considerably smaller than C.fossarum, back black, 

 «ides yellow. 

 Sj). 6. Cor. dorsaJis. Thorax with six transverse black lines on the mar- 

 gin : elytra black and spotted, the anterior margin immaculate. 

 C. dorsalis. Leach, Tians. Linn. Soc. xii. 



Kather larger than C. stagnalis. Back yellow. 



b. Thorax ami elytra smooth and shining. 



Sp. 7. Cor. Geoffroi/i. Yellow : thorax with numerous transverse black 

 lines : elytra black with minute spots : back wholly black : apex yel- 

 lowish. 



La Corise. Geoff. Hist. Nat. des Insect, i. P. 4T8. pi. 9. fig. 7. Sigara 

 striata. Panz. Faun. Lis. Germ. Lis. 50. 23. Corixa Geoftroyi. Leach. 



Length of the body half an inch. 



Inhal)its stagnant waters, and is veiy common. 



" All authors have considered this species as Notonecta striata of 

 Linne, although it will not agree witli his character. It is figured 

 by Geoffroy and Panzer, and is of the former author the species serv- 

 ing as the tx-pe of the genus Corira." 



Sp. 8. Cor. affnis. Yellow : thorax with numerous transverse black 

 lines: elytra black with minute dots : back wholly black, sides deu- 

 tated and yellow. 



Cor. affinis. Leach, Trans. TJnn. Soc. xii. 



Inhabits ponds near Plymouth, but is rare. But half the size of C. Geo/^ 

 Jroyi. 



Order VIII. OMOPTERA. Leach. 



Order IIemipter.i. Linn., Cuvicr, Lamarck. 



Class RiiYNGOTA. Fahr. 



Order IIemiptera. Section 2. Homoptera. Latr. 



Characters of the Order. 

 Rostrnyn attached to the inferior part of the head : eli/tra coriaceous or 



membranaceous throughout; suture straight: thorax composed of. 



twu segments, the second as longer longer than the first: oce//j three. 



Metamorphosis semicomplete, or incomplete. 



Fam. I. CiCADiAD-t. Leach. 

 CiCADARiiE I. Latreilk. 



Antenna composed of six distinct joints: ocelli or little eyes three: tarsi 

 with three joints. 



Genus 293. CICADA. Lamarck, Geoff., Linn., De Geer, Latr. 

 Tettigonia. Fabr. 

 Thighs of the anterior feet thick, dentate. 



Sp. 1. } (PL 5. fig. 2. natural size.) 



The only species known to inhal)it this country was lately disco- 

 vered by Mr. Daniel liyddcr, near the New Forest in Hampshire, 



