On Aquatic Carnivorous Coleoptera or DytiscidoB. 797 



" H. piano, cui simillimus et vaklc affinis, paulo minor. Oblongo-ovatus, sulitus sparsim punctatus, 

 obscunis nigro-piceus. Caput vix pimctulatum, nigro-piceum, postice obsolete fermgineum. Antennae 

 rufo-testaceae, unicolores, nee apice obseuriores. Thorax punctnlatus, nigro-piceus, margine lateral! 

 teniiissime femigineo. Pedes rufo-testacei. Elytra subtiliter confertim punctata, picea ad basin rufo 

 testacea." 



In the Munich Catalogue this is treated as a variety of H. lituratus (No. 569), but it appears to me 

 doubtful whether it be so. — D. S. 



1379. Hydroporus ignotus, Muls., Ann. Soc. Linn. Lyons, VII, p. 305 : op. Ent. XTI, p. 54. France. 

 " Elongatus, subdepressus, nitidulus, parce griseo-pubescens, nigro-piceus, antennarum basi, pedibus. 



pronotiqiie lateribus rufo-testaceis. Elytris margine exteriore, macula antica marginali, duabus posticis 

 submarginalibus, duabus oblongis anticis dorsalibus, testaceis. Pronoto utrinque breviter unistriato 

 Long. 0-0024, larg. 0-001." 



" Environs de Lyon ; tres-rare. Dans les eaux de ITzeron et du Garon." 



" Cette espeoe se distingue du I'Hydr. varius, A ube, ])ar sa forme beaucoup plus allongee et plus 

 dei>i-imee, par sa jjonctuation un peu plus serree, et par Tangle rentrant, forme par la rencontre des 

 cotes du prothorax avec ceux des elytres, beaiacoup plus senti." 



The above diagnosis is followed by an excessively long, minute description of colour, itc. I think the 

 insect will prove to be a variety of Hydroporus varius (No. 544). — D. S. 



1380. Hydroporus inconspectus, Lep., Pet. Nouv. II, p. 53. Europe. 



" Corselet a cotes arrondis. Elytres sans echancrure en arriere de I'epaule, sans cotes saUlantes ; 

 forme ovale allonge ; courljure du corselet assez reguliere, plus grande largeur de celui-ci a peu pres au 

 milieu ; lobe scutellaire du prothorax saUlant mais obtus ou arrondi ; ponctuation du dessus grossiere ; 

 taOle 3| a 6 m.m., sur 4^ m.m." 



This wUl, I have no doubt, prove to be a synonym of H. moestus, Faii-m. (No. 456). — D. S. 



1381. Hydroporus incrassatus, Th. Op. Ent. IV, p. 366. Sweden. 



" Elongatus, fusco-testaceus, capite magno antice, antennis basi pedibusque testaceis ; prothorace apice 

 quam basi pai-iun angustiore, lateribus leviter rotundatis, margine incrassato, disco Isevi, limbo elytrisque 

 tenuissime pubescentibus obsoletius punctatis. Long. 1 lin." 



" Mas, imguiculis anticis insequalibus." 



" Statura fere H. umbrosi, sed minor, angustior, prothorace apice quam basi vix angustiore, margine 

 lateraU, prsesertim antice incrassato mox distinctus ; ab H. pygmseo colore minus Iseto, capite majore 

 prothoraceque discedens. Caput sat magnum, semicirculare, prothorace paulo angustius, fuscum, limbo 

 anteriore testaceo, foveolis frontalibus sat magnis. Antenna? tenuiores, nigro-fuscsB, articulis primis totis, 

 reliquis basi testaceis, tertio et quarto reliquis paulo angustioribus, baud transversis. Prothorax fortiter 

 transversus, apice quam basi vix angustior, angulis anticis porrectis, basi medio minus late productus, 

 angulis posticis rectis, lateribus leviter, aaqualiter marginatis, margine, prsesertim antice incrassato ; disco 

 leviter convexo, Ijevi, glabro, limbo minus crebre, subtiliter punctato. Elytra prothorace quintuplo 

 longiora, lateribus parum rotundatis, apice subacuminata ; disco leviter convexa, fere glabra, fusco-testacea, 

 minus crebre, baud fortiter punctata. Corpus subtus fusco-testaceum, pectore obscuriore. Pedes testacei, 

 femoribus posticis obscurioribus." 



1382. Hydroporus inefficiens, "Walt., Ann. Nat. Hist., 1859, p. 51 (3rd Ser., Vol. III). Ceylon. 



" Testaceus, thorace maculis duabus posticis transversis nigris, elytris cinereis, glabris testaceo-strigatig 

 basi nigris. Long, f lin." 



According to the type in the British Museum this is a species of Laccophilus. — D. S. 



5 K 2 



