Heterocerus. 279 



Hydraena riparia, Schonh. Syn. 2. 42. 5. 

 Ochthebius riparius, Dej. Cat. p. 5o. 

 pygmaeus, Ahr. Fn. Ins. Eur. 8. f. 7. 



10. E. marinus p. 10 4. Ochthebius mciri- 

 nus, Dej. Cat. p. 5o. 



Hydraena margi-pallens^ Schonh. Syn. 2. 42. 2. 



11. E. minimus p. i54. ^Ar. .F/z. Ins. 

 Eur. 8. /. 6. 



Hydraena longi-palpis, Schonh. Syn. 2. 42. 1. 

 Dej. Cat. p. 5o. 



12. E. minutissimus p. i36. TVeb. et 

 Mohr it. Suec. p. 64. 



Hydraena minutissima^ Schonh. Syn. 2. 42. 4. 



/)ey. CVzf. p. 5o. 

 Habitat etiam in Finlandia, Dom. Vasast- 



jerna. 

 Obs. Ad genus Ptilium pertinere autumat Dom. 

 Com. Mannerheim. 



Familia 5. Amphibii p. 157. 



Obs. Genera huc relata a Dom. Com. Dejean, 

 Cat. p. 4g. 5o. , in Familia Clav»cornium locata, 

 Gyrino excepto, ad Hydrocantharos relato. 



HETEROCERUS. 



1. H. marginatus p. 1^7. Schonh. Syn. 

 2. i5o, 1. 

 H. laevigatus, Dujft. Fn. Austr. i.5io. 2. 

 Var, d, elytris ferrugineis, nigro-maculaiis. 

 Sahlb. Ins. Fn. 4. 45. 1. var. e. 

 Habitat cum prioribus rarius. 

 Obs. H. marginatus, Dufft. Fn. Austr. 1. 3og. 

 1. corpore magis hirto difTerre videturj H. variega- 



tus , 



