428 Or Aquatic Carnivorous Coleoptera or Dytiscide. 
Mas, tarsis anterioribus et intermediis latis, anterioribus articulo 2° fortiter 
transverso, unguiculis magis elongatis et crassioribus; prothorace basi elytris fere 
latiore. 
Fem., tarsis anterioribus et intermediis sat latis, prothorace basi elytris 
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 68° 20' (Sahlberg), in the south extends to 
Munich and Geneva. 241. 
473. Hydroporus leviventris, Reiche, M.C.—¢ 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. 43, lat. 28 
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 
valde rotundato-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, anterioribus 
rufescentibus, femoribus basi obscurioribus. Long. 52, 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-sinuato ; elytris basi 
apiceque irregulariter rufescentibus, serie suturali punctorum impressorum profunda; 
corpore omnium subtilissime punctulato: pedibus nigricantibus, anterioribus paulo 
dilutioribus, tarsis rufescentibus. Long. 5 m.m., lat. 3 m.m. 
Mas, tarsis anterioribus et intermediis dilatatis, anterioribus preesertim latis, 
unguiculo posteriore valde elongato; thorace basi utrinque minus rotundato, 
