Species of Haliplida. and HydroporidcB. 419 



Island, Tsau-ll-an, Korea, by Mr. A. AtlaniSj and by him kindly 

 placed in my collection. 



4. H. simplex, n. sp. 



Ovalis, convexus, ad apicem subacuminatus, testaceus, punctis 

 inaculisque nigris ; capita sparsim punctato, fulvo, ad basin 

 transversa fusco ; thorace antice hand emarginato, lateribus 

 rectis (baud rotundatis), obliquatis, basi sinuato, sparsim et 

 fortiter punctalo, flavo; elytris 9 punctato-striatis (punctis fre- 

 quentibus, sat magnis, nigris), interstitiis sparsissime punctatis 

 ad latera undique maculis tribus infuscatis, ad mediumque und 

 plus minus transversa, corpore subtus punctato, flavo ; pedi- 

 bus rufo-fuscis, antennis rufis. 

 Long. Corp. lin. 1 ; lat. lin. f , 



The thorax of H. simplex is immaculate, the base and apex 

 being sparingly punctate ; the elytra have nine rows of large and 

 closely arranged punctures, the interstices being also sparingly 

 punctate; these punctures are black, the margins of the punctures 

 being somewhat suffused; near the sides this suffused black colour- 

 ing of the punctures is ante-medially, post-medially, and nearer 

 the apex more confluent ; thus forming three indeterminate infus- 

 cations ; a similar cloudy marking is formed transversely near the 

 middle. 



A single example of this species is in my collection, taken by 

 Mr. A. Adams, in a pond on Deer Island, Tsau-li-an, Korea. 



Tribus II. HYDROPORID^. 



Genus 1. Hyphidrus, Illig. 



1. H. orientalis, n. sp. 



Ovatus, brevis, crassus, suprk modice convexus^ fortiter punc- 

 tatus, punctato-striatus, rufus, nigro-notatus ; capite antice 

 marginato, sparsim punctato, rufo ; thorace antice emarginato, 

 lateribus apicem versus contractis, baud rotundatis, margi- 

 natis, basi lat^ ad medium angulato, fortiter punctato pre- 

 sertim ad basin, rufo, ad mediam basin nigro-binotato ; elytris 

 robustis, brevibus, leviter unistriatis, fortiter punctatis, rufis, 

 sutura vittd irregulari ant^ medium alteraque post medium 

 inaequalibus undulantibus nigris, vitta anteriori interdum ad 

 medium elytri interrupta, vitt4 postica ssepius ad suturam 

 maculam nigram undique continenti, arcuata; suturd inter 



F F 2 



