424 Rev. H. Clark's Descriptions of new 



nigro, ad latera subrufulo; elytris brevibus, baud pnnctato- 

 striatis, piinctatis ; ad latera obscure marginatis, nigris, cor- 

 pora subtus rufo-fusco : antennis pedibusque rufis. 



Var. Fusco-brunneus, insulam Javam habitat. 



Long. corp. 1 lin. ; lat. ^ lin. 



This species in form is almost circular, of a bright, shining, 

 black colour throughout, the head and the thorax only being 

 tinged with rufous ; the punctures are a trifle larger and more 

 thickly disposed on the thorax than on the elytra ; on the latter 

 they are irregular and more minute, there being no trace of any 

 striae-like rows. 



H. carhonarius is in the same section as Hydroporus {Hydro- 

 ovatus, Motsch.) oblusus, Motsch,, from India, which it nearly re- 

 sembles : it is broader, less oblong, very slightly and not decidedly 

 acuminated at the apex ; it is more closely allied still with (though 

 entirely distinct from) a species from N. York, which I have re- 

 ceived as H. convexus of Aube; as this name, however, seems to 

 be indiscriminately applied to two or three N. American species, 

 and is involved in doubt which I am not at present able to clear 

 up, I need not more fully point out the distinctions. 



The above diagnosis is drawn up from an example which Mr. 

 E. Adams took in Danes Island, China, in 1848. 



1 have received examples from Mr. Bowring, from Java, 

 which, though slightly different in some details, I refer with hesi- 

 tation to this species (pro tempore, at least,) as a variety ; the 

 colour is fuscous, or rufo-fuscous, rather than black. 



2. H. badius, n. sp. 



Breviter ovatus, latus, sat depressus, punctulatus, nitidus, rufo- 

 ferrugineus ; capite inter oculos undique longitudinaliter de- 

 presso, impunctato, rufo ; thorace anticfe emarginato, lateribus 

 subrotundatis obliquis, basi rectilineari, baud sinuato, ad me- 

 dium late angulato punctato ; elytris brevibus, ad humeros 

 cum thoracis margine baud angulum formantibus, punctatis; 

 corpore subtus, pedibus, antennisque rufis. 



Long. Corp. lin. 1 ; lat. lin. ^. 



Four examples in my cabinet correspond exactly in punctuation 

 and size : I may notice that this species, as well as other Asiatic 

 species of Hyphidrus, shows that the limits of these two genera 

 approach most closely each other; the distinguishing characteristic 

 is found in the length, as compared with the breadth, of the joints 

 of the anterior (dilated) tarsi of the male. In H. badius, manifestly 



