( 6 ) 
10 nebulosus, Forst. 
11 conspersus, Marsh 
12 striolatus, Gyll. 
13 femoralis, Payk 
14 abbreviatus, F. 
undulatus, Schr 
15 arcticus, Payk. 
16 sturmii, Gyll. 
17 chalconotus, Panz. 
18 melanarius, Aube, 
tarsatus, Zett. 
[9 bipustulatus, L. 
v. solieri, Aube. 
Platambus, Thoms. 
1 maeulatus. L. 
v. pulchellus, Heer 
llybius, Er. 
1 fuliginosus, F. 
2 fenestratus, F. 
3 ater, De G. 
4 obscurus, Marsh. 
v. sexdentatus,Schiodte. 
5 subieneus, Er. 
6 guttiger, Gyll. 
7 amescens, Thoms. 
Copelatus, Er. 
1 agilis, F. 
Rhantus, Lac. 
1 graph, Gyll. 
2 exoletus, Forst. 
3 pulverosus, Steph. 
4 notatus, Berg. 
5 bistriatus, Berg. 
6 adspersus, F. 
Colymbetes, Clairv. 
1 fuscus, L. 
Dytiscus, L. 
1 punctulatus, F. 
2 marginalis, L. 
3 circumflexus, F. 
4 circumcinctus, Ahr. 
5 lapponicus, Gyll. 
6 dimidiatus, Berg. 
Hydaticus, Leach. 
1 transversalis, Berg. 
2 seminiger, De G. 
hybneri, F. 
Acilius. Leach. 
1 sulcatus, L. 
v. scoticus, Curt. 
2 fasciatus, De G. 
canaliculatus, Nic. 
Graphoderes, Escli 
1 cinereus, L. 
GYRINIDJE. 
Gyrinus, GeofF. 
1 minutus, F. 
2 urinator, Ill. 
3 suffriani, Scriba. 
4 colj'mbus, Er. 
caspius, Sharp. 
5 striolatus, Fowler, 
caspius, Reg. pars. 
6 natator, Scop, 
mergus, Ahr. 
7 elongatus, Aube. 
8 bicolor, Payk. 
9 marinus, Gyll. 
to opacus, Sahl. 
Orectochiliis, Lac. 
1 villosus, Miill. 
HYDROPHILIDIE. 
Hydrophilina. 
Hydrophilus, auct. 
1 piceus, L. 
Hydrous, auct. 
1 caraboides, L. 
Hydrobius, Leach. 
1 fuscipes, L. 
v. seneus, Sol. 
2 picicrus, Thoms. 
3 oblongus, Herbst. 
Paracymus, Thoms. 
1 nigroTeneus, Sahl. 
Anacsena. Thoms. 
1 globulus, Payk. 
2 limbata, F. 
variabilis, Sharp. 
3 bipustulata, Steph. 
Philydrus, Sol. 
1 testaceus, F. 
2 maritimus, Thoms. 
3 nigricans, Zett. 
4 melanocephalus, 01. 
5 minutus, F. 
marginellus, Mills. 
6 coarctatus, Gredl. 
v. suturalis, Sharp. 
Cymbiodyta, Bed. 
1 ovalis, Thoms, 
marginellus, F. 
Enochrus, Thoms. 
1 bicolor, Gyll. 
Helochares, Muls 
1 lividus, Forst. 
2 punctatus, Sharp. 
Laccobius, Er. 
1 sinuatus, Mots, 
nigriceps, Thoms. 
2 alutaceus, Thoms. 
3 minutus, L. 
4 bipunctatus, F. 
Berosus, Leach. 
1 spinosus, Stev. 
2 signaticollis, Charp. 
3 luridus, L. 
4 affinis, Brull. 
Limnebius, Leach. 
1 truncatellus, Thoms. 
2 papposus, Muls. 
3 nitidus, Marsh. 
4 picinus, Marsh. 
Chsetarthria, Steph. 
1 seminulum. Herbst. 
