814 On Aquatic Carnivorous Coleoptera or Dytiscide. 
throughout, each with 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 Celambus resembling D. parallelogrammus, but much more finely and evenly punctured ; it may 
be placed near Hydroporus nubilus (No. 403).—D. 8. 
1448. Hydroporus vestitus, Gebl., Bull. Mosc., 1848, III, p. 76. Siberia. 
‘“‘Oblongo-ovatus nigrescens, subtilissime coriaceus, griseo-subtomentosus, nitidulus, ore, antennis 
pedibusque luteis, thorace lateribus rotundato, late reflexo, linea transversa impressa, elytris linea 
longitudinali impressa. Long. 2 lin., lat. 1 lin.” 
“ Parum nitidus, tomento brevissimo, griseo adspersus ; statura H. opatrini, Il.” 
“Er steht der H. opatrinus am nachsten ist aber flicher, feiner punktirt, glinzender und anders gefarbt 
das halsschild anders gebildet.” 
Leprieur has made known that this isa distinct species allied to Hydroporus meestus (No. 456).—D.S. 
1449. Hydroporus vitticollis, Boh., Ins. Caff. I, p. 256. Carffraria. 
“ Oblongus, parum convexus, nitidus niger; capite antice, palpis, antennis pedibusque rufo-testaceis ; 
prothorace flavo-testaceo, postice late infuscato; elytris obsolete, crebre punctulatis, maculis duabus 
lateralibus, tertiaque apicali, flavo-testaceis. Long. 14, lat. $m. m.” 
[This diagnosis is followed by a long description. | 
T have no idea what position the species should occupy.—D. 8. 
1450. Hydrovatus (Oxynoptilus) ferrugatus, Regt., Ann. Soc. Fr. 1877, p. xxix. Manilla. 
“ Ovalis, fere rotundatus, vix postice attenuatus, sed fortiter acuminatus, creberrime punctatus, fortius 
in elytris, supra ferrugineus, ad latera vix dilutior, ad basin et suturam elytrorum vix obscurior ; subtus 
ferrugineo-testaceus, pedibus concoloribus. Long. 24 a 2? m. m.” 
[At p. 360, op. cit., this diagnosis is supplemented by a description. | 
1451. Hydrovatus hornii, 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: metasternum very coarsely punctate, 
Length ‘13 inch.” 
According to a type recently communicated to me by Dr. Horn, this species is closely allied 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. 8. 
1452. Hydrovatus maculatus, Motsch., Et. Ent. 1859, p.42. India. 
“ De la forme raccourcie du Hydrov. subrotundatus, mais deux fois plus petit et d’une couleur rousse sur 
la téte et le corselet, presque noire sur les élytres, ou les cdtés sont de teinte testacée avec trois larges 
sinuosités et un point de cette méme teinte vers le milieu prés de la suture ; le bord postérieur de la téte 
et du corselet, ainsi que le metathorax, sont brundtres; antennes et pattes roussitres. Ponctuation sur 
les élytres tres fine et peu apparente, nulle sur la téte et le corselet qui sont trés luisants comme les 
premiéres. Egalement du continent Indien,” 
