books.google.it - This volume treats the 157 species of predaceaous diving beetles (Dytiscidae) found in Finland, East Fennoscandia, Sweden, Norway, Denmark and the Baltic States.Introducing chapters provide general information about the state of knowledge and distribution, morphology of adults and larvae, bionomics,...http://books.google.it/books/about/The_Aquatic_Adephaga_Coleoptera_of_the_F.html?id=WNbFgEPGZlsC&utm_source=gb-gplus-shareThe Aquatic Adephaga (Coleoptera) of the Fennoscandia and Denmark. Ii. Dytiscidae
