Oil Aquatic Carnivorous Coleoptera or Di/tiscitke. 39 L 



371. Hydroporus solieri, Aubc, M.C. — Ovalis, sat brevis, convexus, sine pubes- 

 centia, testaceus ; elytris lineis quatuor pluries valde interruptis nigris, dense 

 punctatis; corpore subtus fortiter punctate. Long. 5, lat. 3 m.m. 



3fas, supra fortiter punctatus sat nitidus, tarsis anterioribus et intermediis fortiter 

 dilatatis, tibiis intermediis ad basin angustis, dimidio inferiore lato iutus sub- 

 angulatim dilatato. 



Fern., subtiliter punctata opaca, pedibus simplicibus. 



This species varies greatly as to the black markings, which are sometimes nearly 

 entirely absent. 



Egypt, Persia, Arabia, Northern India. 174. 



I. 33.— Genus PAROSTER. 



The longitudinal ridge on inner face of wing-case very little developed ; posterior 

 coxal cavities much exposed and a good deal separated; posterior portion of 

 epipleura very narrow ; hind tibia with only the serial punctures on the infero- 

 external face. Mesosternal fork not connected with the inter-coxal process of 

 metasternum. 



The three species have the hind coxal cavities more exposed and separated than 

 any other Hydroporini, and in this respect approach Bidessus of the Bidessini. 

 They are found in Australia. 



372. Hydroporus nigro-adiimbratus, Clk., j\f.C. — Ovalis, convexus, sine pubescentia, 

 nitidus, fuscu.s, antennis, pedibus, tliorace in medio et ad latera elytrisque testaceis ; 

 prothorace anterius et postering subtiliter punctato, medio impunctato ; elytris 

 parce, subtiliter sed evidenter punctatis ; corpore subtus fere impunctaco ; tibiis 

 anterioribus apicem versus latis. Long. 3f, lat. 2 m.m. 



Mas, tarsis anterioribus dilatatis, unguiculis valde elongatis. 



I have seen but a single individual of the species. 



Australia, (Adelaide). 419. 



373. Paroster pallescens, n. sp. — Ovalis, convexus, sine pubescentia, vix nitidus, 

 fuscus, supra cum antennis pedibusque testaceus, capite magis obscure ; thorace 

 elytrisque sparsim subtilius punctatis ; corpore subtus fere impunctato ; tibiis 

 anterioribus versus apicem latis. Long. 3f, lat. vix 2 m.m. 



