On Aquatic Carnivorous Coleoptera or Dytiscide. 809 
plus profonde, mais moins serrée & la base et latéralement, extrémement fine sur le disque. Elytres assez 
larges, reguliérement ovales, ne formant pas d’angle sensible avec les cétés du corselet, légerement 
attenuées en arriére et assez largement arrondies 4 |’extrémité; une bande rougeatre un peu confuse, 
embrassant tout le pourtour des élytres, dilatée vers la base en dedans, et marquée un peu au-dela du 
milieu d’un trait longitudinal noiratre; ponctuation trés fine et serrée ; une ligne de points en forme de 
strie suturale bien marquée, un autre vers le milieu, effacée. Pattes noiratres ; genoux, base des tibias 
et tarses rougeatres ; chaque article de ceux-ci obscur a l’extrémité, 
“Tl a quelques rapports, pour la bande laterale des élytres, avec les H. striola et vittula, mais il s’en 
distingue sans peine par sa couleur noire, sa forme courte, large, son corps non pubescent, sa fine 
ponctuation, ete.” 
La Saulcette, Savoy, with D. palustris, in April. 
1427. Hydroporus sansi, Aubé, Ic. V, p. 232, pl. 26, f. 6. Spec. p. 509... Europe. 
“Oblongo-ovalis, convexiusculus, pallide testaceus, thorace ad latera late rotundato, vix postice nigro- 
maculato, transversim ad basin depressiusculo ; elytris tribus fasciis irregularibus, oblique transversis, 
plus minusve confluentibus nigro-ornatis, apice vix denticulatis. Long. 5, larg. 25 m.m.” 
[This diagnosis is followed, l.c., by a long description. | 
Tt would seem doubtful whether this be more than a variety of Dytiscus depressus (No. 472) ; the two 
-individuals described by Aubé were found at Barcelona.—D. 8. 
~ 1428. Hydroporus sedilloti, Regt., Ann. Soc. Fr., 1877, p. 352. Syria. 
“ H. vario Aubé sat vicinus, sed multo magis depressus et elongatus, haud dilatatus ; capite rufo, ad 
‘verticem et oculos infuscato ; prothorace rufo, antice, postice et in disco late infuscato, ad latera et basin 
punctulato, in medio fere levi, atque striga fere marginali utrinqueimpresso. Elytris sparsim punctulatis 
“depressis, elongato-ovatis, haud dilatatis nec attenuatis, nigro-fuscis, lateribus, vittis tribus longitudinali- 
bus, macula sublaterali post medium et apice testaceis ; vitta interiore brevissima, seepe obsoleta, secunda 
‘plus minusve abbreviata et ad basin extus hamulata, tertia apicem attingente, et antice cum margine, ad 
medium cum inacula sublaterali confluente ; epipleuris testaceis. Subtus niger, ano ferrugineo ; pedibus 
‘yufo-ferrugineis ; antennis ad basin testaceis, postea infuscatis. Long. 21 m.m.  Djebel-ech-Cheik, 
Borak.” 
[This is followed, l.c., by a description wm French, in greater part a translation of the above. | 
1429. Hydroporus sellatus, Lec., Proc. Ac. Phil. 1866, p. 365. North America. 
- Qvyalis, convexus, modice elongatus, nitidus, subglaber, capite nigro-piceo subtiliter haud dense 
-punctato, ore maculaque occipitali testaceis, thorace testaceo, apice infuscato, basi late piceo, profunde 
punctato, lateribus obliquis rectis, cum elytris (lateraliter visis) angulum valde obtusum formantibus ; 
elytris pallidis, profunde sat dense punctatis, punctis majoribus versus suturam et in vitta dorsali parum 
distincta digestis, sutura, lineolis paucis, plagaque postica irregulari subsuturali maxima nigris ; subtus 
niger, rude punctatus, pedibus testaceis, antennarum apice femoribusque infuscatis, Long. 3°5 m.m.” 
Dacotah. 
[A comparison with H. suturalis follows the above diagnosis. | 
__A specimen of this species recently communicated to me by its describer, indicates it as being a species 
of Ceelambus closely allied to Hydroporus medialis, No. 401, but distinct therefrom by a dark coloured 
prothorax, a dark mark on each side of the head, the antenne infuscate towards their apex, the upper- 
surface rather less coarsely punctured, and very minute central line on the prothorax.—D. 8. 
1430. Hydroporus semiclusus, Walk., List. Col. Lord, p. 10. Wady Ferran. 
“Black, oval, slightly shining. Head with a large tawny patch extending to the fore border, near 
