32 



Genus [287]. Ociithebius. Leach. Ten species. 



O. marinus, Payk. Brassy green and shining; antennae 

 and legs testaceous ; about a line ; stagnant waters. 

 PL 38, Jig. 4. 

 Genus [288]. Amphibolus. Waterh. One species. 



A. atricapillus, Waterh. Testaceous, with a coppery reflec- 

 tion ; head black ; antennae, palpi and legs dusky testa- 

 ceous ; about a line long ; running streams, Yorks. PL 

 38, fig. 5. 

 Genus [289]. Hydr^na. Kugelann. 



H. riparia, Kug. Pitchy black, shining ; antennae, palpi 

 and legs reddish testaceous ; one line and a quarter ; 

 PL 38, Jig. 6. 



Family [S3]. Hydropiiilid^:. Leach. 



Genus [290]. Limnebius. Leach. Nine species. 



L. truncatellus, Fab. Deep black ; antennae, palpi and legs 

 reddish ; one line and a quarter ; ponds, ditches and 

 streams. PL 39, Jig. 1. 

 Genus [291]. Laccobius. Erichson. One species. 



L. minutus, Lin. Black ; head and thorax brassy ; elytra 

 dirty testaceous, sprinkled with dark spots ; antennae 

 and legs pale ; one line and a half; ponds and ditches. 

 PL 39, fig. 2. 

 Genus [292]. Berosus. Leach. Four species. 



B. luridus, Lin. Obscure testaceous ; head and a square 



spot on the thorax brassy ; elytra with dispersed dark 



spots ; legs pale, their tarsi darker ; two and a half to 



three lines ; ponds and ditches. PL 39, Jig. 3. 



Genus [293]. Hydrous. Lin. One species. The tarsi of 



the female are simple. 



H. piceus, Lin. Entirely of a greenish black, shining ; 

 antennae reddish pitchy ; legs pitchy ; one inch and three 

 to six lines ; stagnant ponds and ditches. PL 39. Jig. 4. 

 Genus [294]. Hydropiiiltjs. Fab. One species. 



II. caraboides, Lin. Greenish black and shining; antennae 

 and palpi pitchy red; legs pitchy; about ten lines; 

 ponds and ditches. PL 39, Jig. 5. 

 'Genus [295]. Hydrobius. Leach. Five species. 



H. oblongus, Herb. Pitchy black and shining; antennae, 

 palpi, tibiae and tarsi reddish ; four lines ; bank of ponds. 

 PI. 10, Jig. 1. 

 Genus [296]. Piiiuiydrus. Solier. Fifteen species. 



P. melanocephalus, Fab. Testaceous; head, disk of thorax, 



