CLASS V. INSECTA. 225 



Genus 285. ACANTHIA. Sc/irank, Lafr., Leach. Cimex. Linn., 

 De Geer, Geo(f. Salda. Fubr. LvGius. Wolff. 



Antenna filiform : rostrum straight, long. 



Sp. 1. Acan. maculatii. Black spotted with pale colour. 

 Acanthia maculata. Latr., Leach. 

 Inhabits grassy banks. 



Section IT. AQUATICA. Leach. 



Fam. Hydrocorisi.e. Latrcilk. 



Antenna very minute, not exserted, inserted beneath the eyes. All 

 the insects of this section live in the water. 



Fam. VI. Nepad.e. Leach. 

 Anterior tarsi united with the tibia; : body depressed or linear. 



Stirps 1. — Anus without setae : tarsi of the four posterior feet distinctly 

 biarticulate : antennw Ibur-jointed. 



Genus 286. NAUCORIS. Geoff., Fair., Oliv., Latr., Leach. Ne- 

 PA. Linn., De Geer. 

 Four posterior Jeet ciliated, formed for swimming : antenna inserted 



beneath the eyes : bodi/ ovate, much depressed. 

 Sp. 1. Nau. cimicoides. 

 Inhabits ponds. 



Stirps 2. — Anus furnished widi t\vo setas: tarsi of the four posterior 

 feet one-jointed : antenna three-jointed. 



Genus 287. NEPA. Linn., De Geer, Fabr., Oliv., Lam., Latr., 

 Leach. Hepa. Geoff, 

 nostrum perpendicularly inflected : bodj/ oval : anterior thighs thick ; 



Jour hinder feet not elongate-filiform. 

 Sp. 1. Nepucinerea. Dark grayish-black. {PL 5. Jig. 4.) 

 Nepa cinerea. Linn., Fabr., Latr., Leach. 

 Inhabits ditches : is very common. 



Genus 288. RANATRA. Latr., Fabr., Schellenberg, Leach. Nepa. 

 Linn., De Geer, Oliv., Lam. Hepa. Geoff. 

 Rostrum porrected : bodi/ linear : four hinder Jeet very long, filiform : 



thighs of anterior feet elongate. 

 Sp. 1. Ran. linearis. Grayish brown. 



Ranatra linearis. Fabr., Latr., Schell., Leach. Nepa linearis. Linn. 

 Inhabits the ditches and ponds of Europe. It is very local in this 

 country. It may occasionally be found near London in ponds on 

 Epping Forest, Copenhagen Fields, and near Hammersmith. 



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