428 0:1 Aquatic Cr.irnivorous Coleoptera or DijtisoidcB. 



Mas, tarsis auterioribus et intermediis latis, anteriorlbus artlculo 2° fortiter 

 transverse, unguiculis magis elongatis et crassioribus ; prothorace basi elytris fere 

 latiore. 



Fern., tarsis anteriorlbus et intermediis sat [latis, j^'^'othorace basi elyti'is 

 angustiore. 



This species varies greatly in the markings of the upper and under surfaces, and 

 is sometimes nearly entirely pale. 



Europe and North America. Ascends in Lapland to CS° 20' (Sahlberg), in the south extends to 

 Munich and Geneva. 241. 



473. Hydroporus Ireviventris, Reiche, M.C. — i Ovalis, convexiusculus, dense 

 subtilissime pubescens, subtus nigricans (vel obscure ferrugineus), supra testaceus, 

 prothorace basi maculis fuscis, elytris lineis tenuibus maculisque interjectis 

 nigricantibus ; prothorace elytris fere latiore, angulis posterioribus per-obtusis fere 

 rotundatis ; elytris apicem versus denticulo minuto ; corpore dense subtilissime 

 punctato, thorace basin versus punctis majoribus sat conspicuis. Long. 4?, lat. 2| 

 m.m. 



I have seen but two (male) individuals of this species, they have the front and 

 middle tarsi strongly dilated, the claws of the front ones elongate, and the anterior 

 one dilated at the base. 



Syria. 250. 



474. Hydroporus insignis, Klug, M.C. — Ovalis, convexus, subtilissime pubescens, 

 opacus, niger, capite ferrugineo, ad oculos infuscato ; thorace lateribus obliquis, basi 

 valderotundato-sinuato ; elytris ferrugineo-testaceis, fascia lata transversa in medio 

 sutura maculisque minimis posticis nigris ornatis, apicem versus denticulatis, seriebus 

 suturalibus et discoidalibus punctorum impressorum vix distinguendis ; corpore 

 omnium subtilissime punctulato : pedibus posterioribus nigricantibus, anteriorlbus 

 rufescentlbus, femorlbus basi obscuriorlbus. Long, bh, lat. 3 m.m. 



The few specimens I have seen of this species are all I think females. 



Sinai. 253. 



475. Deronectes princeps, n. sp. — Ovalis, convexus, subtilissime pubescens, niger 

 capite dilutiore ; thorace lateribus obliquis, basi rotundato-slnuato ; elytris basi 

 aplceque Irregularlter rufescentlbus, serie suturall punctorum impressorum profunda; 

 corpore omnium subtilissime punctulato : pedibus nigricantibus, anteriorlbus paulo 

 dilutloribus, tarsis rufescentlbus. Long. 5 m.m., lat. 3 m.m. 



Mas, tarsis anteriorlbus et intermediis dllatatls, anteriorlbus pr£esertlm latis, 

 ungulculo posteriore valde elongate ; thorace basi utrinque minus rotundato, 



