814 On Aquatic Carnivorous Coleoptera or Dytiscidce. 



throughout, each witli the suture (very narrowly) and three lines black, almost entire, a fourth line is 

 broadly interrupted in the middle and at the apex. Mas, anterior tarsi short, broad, third joint deeply 

 bilobed, external claw thickened, internal reduced to half the ordinary size, so as to appear rudimentary. 

 Length 5 '5 m. m." 



" British Columbia, one male. Resembles H. parallelogrammus of Europe." 



This is a Coelambus resembling D. parallelogi-ammus, but much more finely and evenly punctured ; it may 

 be placed near Hydroporus nubilus (No. -103). — D. S. 



1448. Hydroporus vestitus, Gebl., Bull Mosc, 1848, III, p. 76. Siberia. 



" Oblongo-ovatus nigrescens, subtUissime coriaceus, griseo-subtomentosus, nitidulus, ore, antennis 

 pedibusque luteis, thorace lateribus rotundato, late reflexo, linea transversa impressa, elytris linea 

 longituduiali impressa. Long. 2 Un., lat. 1 lin." 



" Farum nitidus, tomento brevissimo, griseo adspersus ; statura H. opatrini, lU." 



" Er steht der H. opatrinus am nachsten ist aber fliicher, feiner punktirt, gliinzonder und anders gefarbt 

 das lialsschild anders gebildet." 



Leprieur has made known that this is a distinct species allied to Hydroporus moestus (No. 456). — D. S. 



1449. Hydroporus vitticollis, Boh., Ins. Caff. I, p. 256. Caflfraria. 



" Oblongus, parum convexus, nitidus niger ; capite antice, palpis, antennis pedibusque i-ufo-testaceis ; 

 prothorace flavo-testaceo, postice late infuscato ; elytris obsolete, crebre punctulatis, maculis duabus 

 lateralibus, tertiaque apicali, flavo-testaceis. Long. 1^, lat. ^ m. m." 



[This diagnosis isfoUowed by a long descrvption.'\ 



I have no idea what position the species should occupy. — D. S. 



1450. Hydrovatus (Oxynoptilus) ferrugatus, Regt., Ann. Soc. Fr. 1877, p. Ixxix. Manilla. 



" Ovalis, fere rotundatus, vix postice attenuatus, sed fortiter acuminatus, creberrime punctatus, fortius 

 in elytris, sxipra ferrugineus, ad latera vix diliitior, ad basin et suturam elytrorum %nx obscurior ; subtus 

 ferrugineo-testaceus, pedibus conooloribus. Long. 2| a 2| m. m." 



\At p. 360, op. cit., this diagnosis is supplemented by a description.^ 



1451. Hydrovatus homii, Crotch, Tr. Am. Ent. Soc. IV, p. 387. North America. 



" Extremely like H. cuspidatus, but twice as large, similarly coloured ; head shining, with a few punc- 

 tures on the vertex ; thorax visibly but sparsely punctate ; elytra at the base (especially externally) very 

 coarsely and closely punctate, with a deep submarginal groove : metastemum very coarsely punctate. 

 Length -13 inch." 



According to a type recently communicated to me by Dr. Horn, this species is closely aUied to 

 Hydrovatus major (No. 221), but is smaller, and has the upper surface rather more densely and less 

 coarsely punctured, and the pale portion of the upper surface is more extended. — D. S. 



1452. Hydrovatus maculatus, Motsch., Et. Ent. 1859, p. 42. India. 



" De la forme raccourcie du Hydrov. subrotundatus, raais deux fois plus petit et d'une couleur rousse sur 

 la tete et le corselet, presque noire sur les 61ytres, on les c6t6s sont de teinte testac^e avec trois larges 

 sinuosites et un point de cette meme teinte vers le milieu pres de la suture ; le bord post^rieur de la tete 

 et du corselet, ainsi que le metathorax, sont brunatres ; antennes et pattes roussatres. Ponctuation sur 

 les elytres tres fine et peu apparente, nulle sur la tete et le corselet qui sont tres luisants comme les 

 premieres. Egalement du continent Indien." 



