On Aquatic Carnivorous Coleoptera or Dytiscidce. 807 



narrow sides ; elytra broad, depressed, finely punctate, more distinctly so tlian in H. bryanstonii ; in colour, 

 flavous, faintly clouded with fusco-flavous, the sutural line being distinctly black : abdomen and underside 

 black ; legs and antennse pale flavous." 



" Allied to H. pustulatus, Melsh.; it is a trifle broader, not so convex, and more glabrous." 



This is perhaps to be referred to Hydrovatus.^D. S. 



1419. Hydroporus jiroductus, Fau-m., Ann. Sue. Fr., 1880, p. 248. Algeria. 



" Long. 3;^ m. m. Flongatus, subparallelus, antice posticeque fere sequaliter angustatus, dorso planatus 

 fusco-niger, nitidus, ore antennis pedibusque obscure testaceis ; capite lato, parum convexo ; prothorace 

 brevi, antice augustato, lateribus leviter antice arcuatis, margine postico medio obtuse angulato, ante 

 basin linea arcuatim transversa obsolete impresso, ad angulos posticos evidentius impresso; elytris 

 elongatis ad apicem tantum angustatis, apice ipso obtuso, subtiJissime vix perspicue sat dense punctulatis, 

 utrinqxie lineis 2 fortius punctatis impressis." 



Batna. 



" Reniarquable par sa forme allong^e, presque parallele, et sa ponctuation excessivement fine, a peine 

 distincte, mais assez serree. Sa forme rappelle assez celle des H. notatus et neglectus, mais elle est plus 

 allongee, plus parallele, plus acuminee en arriere et la partie dorsale est plus deprimee ; la ponctuation 

 est aussi toute diSerente et n'est visible qu.' avec un fort grossissement, aussi le dessus est-il plus brillant. 

 La coloration, d'un brun noir fonce, est un peu rougeatre sur la tete, qui est tres finement et densement 

 ponctuee, avec les deux impressions bien marquees." 



1420. Hydroporus pseudo-geminus, Regt., Ann. Soc. Fr., 1877, p. Ixxix. Manilla. 



" H. gemino, Fab., ex Europa valde afiinis, sed magis elongato-oblongus ; prothorace ad latera 

 rotundato, vix postice quam antice latiore, cum elytris angulum sat fortem prsebente ; elytris oblongis, 

 haud parallelis, ut in gemino pictis, sed magis aurato-pubescentibus ; prothoracis et elytri strigis onmino 

 ad basin contiguis et angulum inter se latissimum prsebentibus ; subtus omnino niger, pedibus testaceis ; 

 anteunis testaceis crassiusculis. Long. 2 m. m." 



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



The species is no doubt a Bidessus, like Dytiscus geminus, to which it appears very simUar. — D. S. 



1421. Hydroporus puberulus, Lee, Agass. Lake Sup., p. 215. North America. 



" Elongato-ovalis, minus convexus, niger minus dense punctatus pubescens, thorace lateribus rotundatis 

 ciun elytris angulum formantibus, disco minus puuctato, elytris parallelis, apice oblique attenuatis : 

 antennis palpis pedibusque rufis. Long. '12." 



" Resembles the two next (H. caliginosus and H. tartaricus), but is narrower, a little more convex, the 

 posterior angles of the thorax are somewhat obtuse, and the sides form an angle with the elytra." 



Crotch, " Rev. N. Amer. Dytisc."p. 395, considers this is the same as H. caliginosus (No. 1,348). — D. S. 



1422. Hycb-oporus pudicus, Clk., Tr. Ent. Soc, 18G3, p. 426. Java. 



" Ovalis sat latus et conve.xus, punctulatus, haud striato-pimctatus, i-ufus ; caj)ite pallide rufo, oculis 

 magnis, impunctato ; thorace antice emarginato, lateribus tenue marginatis, basi ad medium late angulato 

 impunctato, inifo, ad basin fusco-rufo ; elytris convexis, robustis, punctulatis, rufis vel fusco-rufis ; pedibus 

 antennis, corporeque subtus rufis. Long. corp. lin. 1 ; lat. lin. ^." 



The type in the Brit. Mus. shows this to be a Hydrovatus, closely allied to H. fulvescens (No. 1 92) 

 but naiTower — D. S. 



