aquatic Coteoptera from Ceylon. 355 



Colombo, in April. This is apparently not an un- 

 common insect, as Mr. Lewis brought back about twenty 

 examples. 



Amphiops mirahilis, sp. nov. 



Subrotundatus, niger, nitidus, siibtus piceus, tibiis dilutioribus ; 

 antennis, pal^ns tarsisque testaceis ; elytris fortiter seriatim punc- 

 tatis, interstitiis crebre fortiterque punctatis. Long. 8^ mm. 



This is closely allied to A. pedestris, but is no doubt distinct, the 

 large punctures of the upper surface being larger and more 

 numerous. Head not very shining, the numerous large punctures 

 being mixed with others much smaller, and which render the 

 surface rather dull ; at the sides of the thorax there are also rather 

 numerous large punctures, and others much smaller. At the sides 

 of the elytra the interstitial punctuation is so numerous and coarse 

 that, being similar to the serial punctuation, this last can scarcely 

 be discriminated from it ; the series of punctures near the suture 

 are subobsolete, and the interstitial punctuation there is almost 

 wanting. 



Kandy, 20th February, 1882. One specimen. 



Hydrochus lacustris. 



Hydrochus lacustris, Nietner, Ann. Nat. Hist. (2), xix., 

 p. 386. 



Colombo. Two specimens. 



Epimetopus jiavidulus, sp. nov. 



Sordide testaceus, pectore capiteque nigris ; prothorace fusco ; 

 hoc inaequali ; elytris tuberculis elongatis metaUescentibus munitis. 

 Long. 3 mm. 



Palpi short, with elongate aciculate terminal joint ; sordid 

 yellow. Thorax greatly produced in the middle in front, at the 

 sides much narrowed behind, so that the base is only about half 

 the width of the wing-cases, the surface, rather rough and uneven, 

 with a peculiar marginate elevation on the middle near the front 

 of the produced part. Elytra yellow, with three or four rows of 

 metallescent elongate tubercular elevations, which do not extend on 

 to the declivous apical portion, or rather are there much smaller 

 and more distant ; between the tubercles there is some indistinct 

 seriate sculpture. Metasternum short. Ventral segments yellow, 

 polished. 



One example of this interesting little insect was found 



