Plate VI. 



Fig. 46. NOTERUS SPARSUS, Marsham, Curtis. [F. Colymbetidre. G. Noterus, Clairv.'] 



Head, thorax, anteunaj, and legs rust-red, elytra reddish brown. Head large, convex, smooth. 

 Thorax transverse, narrowed in front, anterior margin widely emarginate, sides slightly rounded, 

 base sinuate, posterior angles rectangular, smooth. Elytra obconic, gradually narrowed from the 

 base to the apex, with large scattered punctures tending to striaj at the base. Length, 2^-2^ lines. 



Common in ponds and ditches. 



Fig. 47. HYDROPORUS DAVISII, Curtis. \_F. HydroporidiE. G. Hydroporus, Clairv.'] 



Above pale testaceous, oblong ovate, wide, depressed. Head with an arcuate blaclc mark 

 between the eyes. Thorax transverse, narrowed in front, anterior margin widely and deeply 

 emarginate, the sides slightly rounded, the base with a short deep longitudinal impressed line on 

 each side, and a transverse blaclc band fre([uently interrupted in tlie middle. Elytra broad ovate, 

 each with the suture, six longitudinal lines, more or less confluent, and two lateral patches black. 

 Underside black. Tips of palpi, antenna', and tarsi fuscous. Length, 2-2^ lines. 



North of England. 



Fig. 48. COLYMBETES CICUR, Fab. \_F. Colymbetida;. G. Colymbetes, Clairv.'] 

 (C. Consobriuus, Curtis.) 



Elongate ovate, slightly convex. Head black, labrum and a large round spot on the crown 

 reddish yellow, thickly and minutely punctate ; antennre and palpi testaceous. Thorax pitchy 

 black, anterior margin narrowly, sides broadly, reddish yellow, and usually a longitudinal streak 

 on the disc of the same colour, transverse, narrowed and deeply emarginate in front ; sides gently 

 rounded ; base slightly sinuate ; a .short central impressed longitudinal line ; posterior angles 

 nearly rectangular; irregularly punctate. Scutellum and elytra reddish yellow, the latter irrorated 

 with innumerable minute round black spots, the outer margin and four longitudinal lines on eacli 

 reddish yellow, elongate ovate, each with three rows of punctures. Underside and legs reddish 

 yellow. Length, 7^-8 lines. 



Inhabits the Cape of Good Hope. 



Fig. 49. HYDATICUS CINEREUS, Linn., Curtis. [F. Dytiscidse. G. Hydaticus, Leack] 



Ovate, con\'ex. Head yellow, the base and a semicircular mark on the forehead black, finely 

 and rather thickly punctate ; autennai and palpi reddish yellow. Thorax yellow, the anterior and 

 posterior margins broadly black, transverse, narrowed and broadl}' emarginate in front, sides very 

 gently rounded. iScutellum black. Elytra pitchy black, with innumerable minute round yellow 

 spots distributed over the entire disc, external margins yellow ; ovate, exceedingly minutely and 

 rather thickly punctate, each presenting traces of three longitudinal rows of large punctures. 

 Underside and legs reddish yellow. Length, G.^-7 lines. 



Whittlesea Mere, Hunts. 



Fig. 50. DYTISCUS DIMIDIATUS, Bergstr., Curtis, ? . [F. Dytiscidfe. G. Dytiscus, 



Linn.] 



Elongate ovate, above olive-green, front of head and a triangular patch on the crown reddish 

 yellow. Thorax with the lateral margins broadly, the anterior margin narrowly, reddish yellow. 

 Elytra with the lateral margins broadly and a narrow oblique line at the apex reddish yellow ; in 

 the female each with ten longitudinal furrows extending to the middle, in the male smooth, each 

 with three rows of punctnres. Beneath testaceous yellow, the sutures dusky. Legs rust-red, 

 coxal processes obtuse. Length, 17-18 lines. 



Near Cambridge ; Yaxley Fen, and Whittlesea, Hunts ; Salop, Ac. 



U 



