Index Hygrobiidarum. 



Hydrachna F. 323 

 Hygriobia Latr. 323 

 Hygrobia 322 



australasiae Clark 323 

 Davidi Bedel 323 

 Hermanni F. 323 



Genera. 



Paelobius Schönh. 

 Pelobius Er. 323 



Species. 



niger Clark 324 

 tarda Herbst 324 



323 



