42) On Aquatic Carnivorous Coleoptera or Dytiscide. 
Group 1. 
450. Deronectes longipes, n. sp.—Oblongo-ovalis, angustulus, depressus, subtus 
nigricans, supra fuscus, opacus, dense, subtilissime breviterque pubescens, antennis 
pedibusque rufis, illis articulis terminalibus extrorsum fuscis ; prothorace elytris 
multo angustiore, lateribus sinuatis, basin versus angustatis, angulis posterioribus 
rectis ; elytris obsoletissime dense punctatis, serie discoidali punctorum impressorum 
distincta ; corpore subtus subtilissime punctato. Long. 4, lat. 2 m.m. 
The male has the front and middle tarsi very distinctly broader than in the female, 
and the fifth to the seventh joints of the antenne are distinctly longer and thicker 
than the others, whereas in the female this character can scarcely be observed. 
The species is remarkable amongst its allies for the narrow, depressed form, and 
the absence of larger punctures on the elytra. 
Persia. 297. 
451. Deronectes planicollis, n. sp.—Oblongo-ovalis, sat angustus et depressus, 
subtus nigricans, supra fusco-rufus, antennis pedibusque rufis, opacus, dense, sub- 
tilissime brevissimeque pubescens, subtilissime punctatus, capite thorace elytrisque 
punctis majoribus adspersis, sat numerosis; prothorace elytris multo angustiore, 
lateribus sinuatis, basin versus leviter angustatis, angulis posterioribus rectis ; 
elytris serie discoidali obsoleta. Long. 5, lat. 23 m.m. 
The male has the front and middle tarsi strongly dilated ; and the anterior claw 
of the front feet is much incrassate. 
I have seen but a single individual of the species; although closely allied to H. 
parvicollis, Schaum, it is smaller and narrower, and has the thorax less sinuate at 
the sides, and the anterior claw on the male foot incrassate: the thoracic side 
margin is very fine, and there is scarcely any trace of impression along the side 
within it. 
Asia Minor. (Coll. Wehncke). 298. 
452. Hydroporus parvicollis, Schaum, M.C.—Oblongo-ovalis, robustulus, parum 
depressus, subtus nigricans, supra fusco-rufus, opacus, dense, subtilissime brevissime- 
que pubescens, antennis pedibusque rufis, illis crassiusculis ; prothorace elytris multo 
angustiore, lateribus sinuatis, basin versus angustatis, angulis posterioribus rectis ; 
capite fortiter punctato ; thorace basi fortiter sed subobsolete punctato ; elytris 
subtilissime punctatis, punctisque subtilibus obsoletisque tantum ad basin distinctis 
impressis, sulculaque discoidali sat distincta. Long. 5, lat. 27 m.m. 
The only individual I have seen is a typical specimen of Schaum’s, it is no doubt 
a male, and has the front and middle tarsi rather broad. 
