131 



Dyticid^e, Leach. 



Genera. 



Country. 



Typical Species. 



1. Dyticus, Linneus 



France 



D. Latissimus, Linneus, 



2. Leionotus, Kirby 



England 



D. Conformis, Stephens. 



f Cybister, Curtis 

 3.?Trogus, Leach 



(Trochalus, Eschscholtz 

 4. Hyderodes, Hope 



England 



Roeselii, Fabricius. 















New Holland 



Hyd. Shuckardii, Hope. 



5. Acilius, Leach 



England 



Dyt. sulcatus, Linneus. 



„ f Eunectes, Erichson 

 o.i 



I Nogrus, Eschscholtz 







East Indies 



Dyt. griseus, Fabricius. ' 



7. Graphoderus, Esch. 



France 



D. Cinereus. Linneus. 



8. Hydaticus, Leach 



England 



Hybneri, Fabricius. 



9. Agabus, Leach 



England 



D. Serricornis, Paykull. 



10. Ilybius, Erichson 



France 



D. Ater, Fabricius. 



11. Meladema, Laporte 



Gallia Merid. 



D. Coriacea, Hoffmanseag. 



12. Rantus, Eschscholtz 



England 



D. Pulverosus, Knock. 



13. Liopterus, EscMcholtz 



England 



D. Oblongus, Illiger. 



14. Colymbetes, Clairville 



England 



D. Striatus, Linneus. 



15. Necticus, Hope 



England 



D. Bipustulatus, Liniwus. 



16. Copelatus, Erichson 



Brazils 



D. Postica.tus, Fabricius. 



To the above sixteen genera, others might be 

 added on investigating the tropical species, which 

 have been comparatively neglected. The genus 

 Thermonectus of Eschscholtz seems peculiar to the 

 New World, as the characters are unpublished, 

 and the type of the genus is only a manuscript 

 name, I consequently pass it over. The remarks 

 on the above genera will appear under the different 

 names as they occur in the Fabrician Tables. 



k 2 



