804 On Aquatic Carnivorous Coleoptera or Dytiscide. 
the base ; about four more or less confluent lines at base, irregular ones each side and tip dull whitish 
yellow ; beneath black, pectus yellow ; feet honey-yellow. Length over three-twentieths of an inch.” 
This is perhaps a species near Hydroporus eequinoctialis, Clk. (No. 525).—D. 8. 
1407. Hydroporus obscurus, Bab., Tr. Ent. Soc. IIT, 1841, p. 14. Brazil. 
“ Oblongo-ovatus, opacus, minutissime punctatus, supra et subtus fuscus, thorace, antennis pedibusque 
flavis. L. 2, lat. 3 lin.” 
“Minute, oblong-ovate, opaque, fuscous both above and below. Head large. Antenne yellow. 
Thorax yellow, transverse, short, broadly emarginate in front, sides rounded, posterior margins wavy, the 
dise slightly elevated transversely, and a deep abbreviated impressed line on each side behind. Elytra 
ovate, fuscous, the base and suture darkest, the margins and apex reddish, very minutely punctured, and 
slightly downy, an impressed line on each side at the base in continuity with that on the thorax. Body 
beneath slightly downy, fuscous, with the abdomen rather paler. Legs yellow.” 
“‘Hab., Rio de Janeiro.” 
The type of this species appears to be lost from the British Museum ; the name is placed in the 
Munich Catalogue as representing the female of H. nitidus, Bab. (No. 313), H. Miersi, Mun. Cat. but it 
is very doubtful whether that is correct.—D. 8. 
1408. Hydroporus obtusipennis, Sahl., Not. Fenn. XIV, p. 146. Russian Lapland. 
“‘Oblongo-ovalis, modice convexus, tenuissime pubescens, punctulatus, piceo-niger, antennis basi 
pedibusque ferrugineis, femoribus, capite antice posticeque, prothoracis elytrorumque lateribus piceis ; 
capite magno, impressionibus distinctis, prothorace lato, angulis posticis subrectis, lateribus subparallelis, 
postice obtusis. Long. 2 lin.” 
“ Mas : tarsis anticis articulis tribus basalibus fortius dilatatis, unguiculis valde elongatis, subrectis, 
subqualibus, basi dente obsoletissimo armatis.” 
‘H. lapponum, Gyll., valde affinis, sed distincte major, paullo convexior, prothorace majore, angulis 
posticis minus obtusis, elytris postice minus angustatis, pubescentia pagine superioris tenuiore, punctura 
totius fortiore structuraque unguiculorum anticorum in mare distinguendus. Ab H. rufifronte, Duft., et 
arctico, Thoms., prothoracis elytrorumque forma satis differt. Caput latum, subconvexum, remote sub- 
tilissime punctatum, nigro-piceum, antice late margineque basali piceo-rufis, impressionibus anticis satis 
distinctis ; palpis ferrugineis, articulo ultimo piceo. Antenne piceo-nigre, articulis duobus basalibus, 
totis, 3-6 basi pallide ferrugineis, articulo quarto et tertio equalibus, quinto distincte breviore. Pro- 
thorax longitudine plus quam duplo latior, apice quam basi parum angustior, lateribus leviter rotundatis, 
tenuiter marginatis, angulis anticis productis, subacutis, posticis rectiusculis ; supra leviter convexus, 
niger, nitidus, postice transversim fortius impressus, disco levi, limbo omni confertim punctulato, parce 
tenuissime pubescens, lateribus obsolete indeterminatim rufo-piceis. | Elytra basi prothorace vix latiora, 
pone humeros leviter ampliata, deinde lateribus subparallelis, postice conjunctim late rotundata, ante 
apicem obsoletissime sinuata, supra modice convexa, subtiliter punctulata, seriebus punctorum majorum 
nullis, parce tenuissime griseo-pubescentia, nigro-picea, nitida, lateribus dilutioribus ; epipleuris impressis, 
distincte marginatis, remotius punctatis.. Corpus subtus nigrum, subtiliter et distincte punctulatum, 
parce tenuissime pubescens, Pedes ferruginei, coxis femoribus tarsisque apice infuscatis, unguiculis 
albido-testaceis.” 
“Very rare, found in stagnant water on a moss at Ponoj in Russian Lapland (67°) 13th August, 
1870.” 
1409. Hydroporus opacus, Wehncke, Berl. Zeit. XV, p. 163. Lapland. 
“ Oblongo-ovalis, niger, opacus, parcius punctulatus, elytris fuscis, antennis pedibusque ferrugineis. 
Oy 9S 
Long. 14 lin. 
