aquatic Coleoptera from Ceylon. 345 



on the elytra, but from wlaich it differs in having the sutural stria 

 obsolete. The antennfe are short, yellow. Thorax sparingly and 

 obsoletely punctured, yellow fuscescent at the base, on each side 

 with a fine but elongate stria. Elytra rather closely and finely 

 punctured and pubescent, dull ; fuscescent, with yellow marks 

 externally, sutural stria distinct at the extremity only. Under 

 surface only very sparingly and obsoletely punctured. 



Kitulgalle. Nine specimens. The yellow marks on 

 the elytra are variable. 



Hyphydrus indicus. 



Hyphydrus indicus. Sharp, Dyt., No. 353, p. 382. 



Dikoya, in January and February. Twenty specimens. 



This species was previously known only by a single 

 individual of the male sex. Mr. Lewis obtained the 

 female as well as the male. The individuals of the 

 former sex are a good deal smaller, more dull and more 

 finely punctured, the front and middle tarsi are quite 

 small ; there is no impression on the elytra. The 

 maculation of the tarsi exists in each sex. There is 

 apparently very little variation. 



Hyphoporus pugnator, sp. no v. 



Ovalis, convexus, fortiter punctatus parum nitidus, peetore 

 abdomineque nigris, supra testaceus, vertice summo, prothorace 

 basi in medio elytrorumque signaturis nigris ; antennis pedibusque 

 rufis ; tarsis anterioribus et intermediis nigris. Long. 5 mm. 



Head with broad but only very slightly elevated margin in 

 front, the vertex behind the eyes blackish. Thorax very densely 

 pmictured. Elytra with remarkably coarse and deep, rather close 

 punctuation, and with a few fine punctures on the interstices. 



Dikoya, January 26th, 1882. 



Walker's type of H. interpulsus is an insect similar to 

 H. pugnator, but with much more scanty punctuation on 

 the elytra. Mr. Lewis obtained one specimen at Hadley 

 that is probably referable to Walker's species. 



Copelatus p)iisillus. 

 Copelatus pusilluSy Sharp, Dyt., No. 854, p. 580. 

 Colombo. One specimen. 



TRANS. ENT. SOC. LOND. 1890. — PART II. (jUNE.) 2 A 



