Insects. 1889 



sufficiently pointed out by Mr. Babington and Dr. Aube. I think it right to retain 

 for the last species the name under which Sturm has described and figured it. The 

 collection of Fabricius shows that this author confounded, under the name of Dyticus 

 impressus, this and several of the following species. D. ferrugineus of Linne does not 

 belong to this insect, but is, according to his cabinet, the female of Hyphidrus 

 ovatus. 



5. H. variegatus, Sturm, Erichs., Aube. 



— subnubilus, Babington. 



— margine-punctatus, Steph. 111., not Panz. 



— ruficollis, Steph. Man., not Degeer, Erichs. 



6. H. ruficollis, Degeer, Erichs., Steph. 111. 



— impressus, Gyll., Aube. 



— margine-punctatus, Panz. 



— fulvicollis, Steph. Man. 



— melanocephalus, Steph. I1L 



— brevis, Steph. 



— rubicundus, Babington. 



I have referred the H. rubicundus of Babington to this species, according to a 

 specimen named by the author himself, existing in the collection of Mr. T. V. Wol- 

 laston, of Cambridge. 



7. H. cinereus, Aube, Erichs., Schiodte. 



— affinis, Steph. 



8. H. fiuviatilis, Aube, Erichs., Schiodte. 



Of this species I have seen two British specimens only, in the collection of Mr. Wol- 

 laston. 



9. H. obliquus, Fabr., Gyll., Steph., Aube, &c. 



10. H. confinis, Steph. 



— lineatus, Aube, Erichs. 



11. H. lineatocollis, Marsh., Gyll., Steph., Aube, Erichs. 



— bistriolatus, Duftschm. 



Genus Cnemidotus, Illiger, Erichs., Aube. m 

 1. C. casus, Duftschm., Gyll., Steph., Aube, Erichs. 



— impressus, Panz. 



Genus P^lobius, Schbnherr. 

 1. P. Hermanni, Fabr., Oliv., Steph., Erichs., Aube, &c. 



Genus Hyphidrus, Illiger. 

 1. H. ovatus, Linn. (Mus. Banks.) $ , Steph., Erichs., Aube. 

 Dy. ferrugineus, Linn. (Mus. Linn.) ? , Donov. 

 H. ovalis, Fabr., Gyll., <?. 



— gibbus, Fabr., Gyll., £ . 

 Var. H. variegatus, Steph. 



The H. variegatus, Steph. is a pale variety only of H. ovatus : it is totally distinct 

 from H . variegatus, 111., Aube. 



