CLASS V. INSECTA. 225 



Genus 285. ACANTHIA. Sckrank, Latr., Leach. 'Cimex. Linn., 

 De Geer, Geoff. Salda. Fabr. Lyceus. Wolff. 



Antenna filiform : rostrum straight, long. 



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

 Acanthia maculata. Latr., Leach. 

 Inhabits grassy banks. 



Section II. AQUATICA. Leach. 



fam. HyDRocoRisi^. Latreille. 



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

 the insects of this section live in the water. 



Fam. VI. Nepad^. Leach. 

 Anterior tarsi united with the tibiae : bodi/ depressed or linear. 



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

 biarticulate : antenna four-jointed. 



Genus 286. NAUCORIS. Geoff., Fabr., Oliv., Latr., Leach. Nr.- 

 PA. Lin?!., De Geer. 

 Four posterior feet ciliated, formed for swimming : antenna inserted 



beneath the eyes : bodi/ ovate, much depressed. 

 Sp. 1. Nau. cimicoides. 

 Inhabits ponds. 



Stirps 2. — Anus furnished with two setae: tarsi of the four posterior 

 feet one-jointed : antenna three-jointed. 



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

 Leach. Hepa. Geoff. 

 Rostrum perpendicularly inflected : bodi/ oval : anterior thighs thick : 



four hinder feet not elongate^filiform . 

 Sp. 1. Nepacinerea. Dark grayish-black. {PI. 5-fg- 4.) 

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

 Inhabits ditches : is very common. 



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

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

 "Rostrum porrected : body linear: four hinder feet very long, filiform : 



thighs ()f anterior feet elongate. 

 Sp. 1. Raji. linearis. Grayish brown. 



Ranatra linearis. Fabr., Latr., Schell., Leach. I»«epa 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. 



V 



