804 On Aquatic Carnivorous Coleoptera or Dytiscidce. 



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 sequinoctialis, Clk. (No. 525). — D. S. 



1407. Hydroporus obscurus, Bab., Tr. Ent. See. Ill, 1841, p. 14. Brazil. 



" Oblongo-ovatus, opacus, minutissime piinctatus, supra et subtus fuscus, thorace, antennis pedibusque 

 flavis. L. I, lat. I lin." 



"Minute, oblong-ovate, opaque, fuscous both above and below. Head large. Antennaj yellow. 

 Thorax yellow, transverse, short, broadly emarginate in front, sides rounded, posterior margins wavy, the 

 disc 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 i)aler. Legs yellow." 



"Hab., Eio de Janeu-o." 



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. Miei-si, Mun. Cat. but it 

 is very doubtful whether that is con-ect. — D. S. 



1408. Hydroporus obtusipennis, Sahl., Not. Fenn. XIV, p. 146. Russian Lapland. 



" ObloEgo-ovalis, modice convexus, tenuissime pubescens, punctulatus, piceo-niger, antennis basi 

 pedibusque ferrugineis, femoribiis, 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, 

 subKqualibus, basi dente obsoletissirao armatis." 



" H. lapponum, Gyll., valde affinis, sed distincte major, paullo convexior, prothorace majore, angulis 

 posticis minus obtusis, el3'tris postice minus angustatis, pubesccutia paginte superioris tenuiore, punctura 

 totius fortiore stnictiiraque unguiculorum anticorum in mare distinguendus. Ab H. rufifronte, Duft., et 

 arctico, Thoms. , prothoracis elytrorumque forma satis differt. Caput latum, subconvexum, remote sub- 

 tilissime i^unctatum, nigro-piceum, antice late margineque basali piceo-rufis, impressionibus anticis satis 

 distinctis ; palpis ferrugineis, ai-ticulo ultimo piceo. Antennw piceo-nigi-as, articidis duobus basalibus, 

 totis, 3-6 basi pallide ferrugineis, articulo quarto et tertio »qualibus, quinto distincte breviore. Pro- 

 thorax longitudine plus quam duplo latior, apice quam basi parum angustior, lateribus leviter rotundatis, 

 tenujter marginatis, angulis anticis productis, subacutis, posticis rectiusculis ; supra leviter convexus, 

 niger, nitidus, postice transversim fortius impressus, disco Itevi, limbo omni confertim punctulato, parce 

 tenuissime pubescens, lateribus obsolete indeterminatim rufo-piceis. Elytra basi prothorace vis latiora, 

 pone humeros leviter ampliata, deinde lateribus subparallelis, postice conjunctim late rotimdata, ante 

 apicem obsoletissime sinuata, supra modice convexa, subtiliter punctulata, seriebus punctorum majorum 

 nullis, parce tenuissime griseo-pubescentia, nigi-o-picea, nitida, hiteribus dilutioribus ; epipleuris iiiipressis, 

 distincte marginatis, remotius punctatis. Corpus subtus nigrum, subtiliter et distincte jmnctulatum, 

 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 pianctulatus, elytris fuscis, antennis pedibusque ferrugineis. 

 Long. 1| lin." 



