( 5 ) 
Folystichina. 
Polystichus, Bon. 
i vittatus, Brull. 
Dryptina. 
Drypta, F. 
i dent at a, Rossi. 
Brachinina. 
Brachinus, Weber, 
i crepitans, L. 
HALIPLIDJE. 
Brychius, Thoms. 
i elevatus, Panz. 
Haliplus, Latr. 
1 obliqnus, F. 
2 confinis, Steph. 
v. varius, Bold. 
3 mucronatns, Steph. 
4 flavicollis, Sturm. 
5 fulvus, F. 
6 variegatus, Sturm. 
7 cinereus, Aube. 
8 ruficolhs, De G. 
9 fluviatilis, Aube. 
10 striatus, Sharp. 
11 lineatocollis, Marsh. 
Cnemidotus, Ill. 
i impressus, F. 
csesus, Duft. 
PELOBIIDiE. 
Pelobius, Schon. 
i tardus, Herbst. 
DYTISCIDJE. 
Noterina. 
Noterns, Clairv. 
1 clavieornis, De G 
2 sparsus, Marsh, 
capricornis, Herbst ? 
Laccophilina. 
Laccophilus, Leach, 
i interruptus, Panz. 
minutus, Er. 
2 obscurus, Panz. 
hyalin us, De G. 
3 variegatus, Germ. 
HYDROrORINA. 
Ilydrovatus, Mots. 
i clypealis, Sharp. 
Bidessus, Sharp. 
1 unistriatus, Schr. 
2 minutissimus, Germ. 
3 geminus, F. 
Hyphydrus, Ill. 
i ovatus, L. 
Coelambus, Thoms. 
1 versicolor,. Schall. 
reticulatus, F. 
2 quinquelineatus, Zett. 
3 in?equalis, F. 
4 decoratus, Gyll. 
5 confluens, F. 
6 novemlineatus, Steph. 
7 parallelogrammus, Ahr. 
8 impressopunctatus, Sch. 
picipes, F. 
Deronectes, Sharp. 
1 latus, Steph. 
2 assimilis, Payk. 
3 depressus, F. 
4 12-pustulatus, F. 
5 griseo-striatus, De G. 
Hydroporus, Clairv. 
1 pictus, F. 
2 granularis, L. 
3 flavipes, 01. 
4 lepidus, 01. 
5 rivalis, Gyll. 
6 septentrionalis, Gyll. 
7 davisii, Curt. 
8 halensis, F. 
9 dorsalis, F. 
io lineatus, F, 
11 sealesianus, Steph. 
12 neglectus, Schaum. 
13 tristis, Payk. 
14 umbrosus, Gyll. 
15 angustatus, Sturm. 
16 gyllenhali, Schiod. 
17 morio, Dej. 
a triceps, Crotch. 
18 vittula, Er. 
19 palustris, L. 
20 incognitus, Sharp. 
21 erythrocephalus, I. 
22 rufifrons, Duft. 
23 longulus, Muls. 
celatus, Clark. 
24 longicornis, Sharp. 
25 melanarius, Sturm, 
v. monticola, Sharp. 
26 memnonius, Nic. 
27 obscurus, Sturm. 
28 nigrita, F. 
29 discretus, Fairm. 
30 pubescens, Gyll. 
melanocephalus, Marsh. ? 
31 planus, F. 
32 lituratus, F. 
33 marginatus, Duft. 
34 ferrugineus, Steph. 
35 obsoletus, Aube. 
36 oblongus, Steph. 
Dytiscina. 
Agabus, Leach. 
1 guttatus, Payk. 
2 biguttatus, 01. 
nitidus, F. 
3 paludosus, F. 
4 brunneus, F. 
5 uliginosus, L. 
6 aliinis, Payk. 
7 unguicularis, Thoms 
8 didymus, 01. 
9 congener, Payk. 
