11.5 



DYTISCUS, LiNNEus. 



DYTICUS, Geoffroy. 



HYDROPHILID^ and DYTICID^, Leach. 



1. Natator 



2. Americanus 



GYRINUS, Linneus. 



England 

 N. America 



Gyrinus, Auctorum. 

 Cyclous, Esclischoltz. 



I "i 



