On Aquatic Carnivorous Coleoptcra or Dytiscida'. 779 



is remarkable also by its broadly llavous or testaceous thorax combined with the uniform blackness of 

 the elytra, relieved only by the broad and evenly-disposed flavous margiaation, which extends from the 

 humeral angles nearly to the apex." 



" I obtained a single example some years ago in the Gory collection, from China." 



1307. Hydaticus baeri, Regt , Aim. Soc. Fr., 1877, p. Ixxviii. Manilla. 



" Ovalis, sat latus, parum convexus ; siipra flavo-testaceus, capite in vertice et circum oculos et lineis 

 duabus cu)'vis, iirothorace late antice et postice, elytris vittis duabus transversis latissimis sutui'aque ad 

 apicem flavo-guttata nigro-ornatis ; subtus uigor vix ferrugineus ; pedibus testacois prseter posticis nigro- 

 ferrugineis. Long. 13 m.m." 



[This diagnosis is supplemented (op. cit., p. 355) b>/ an extended description^] 



It ajjpears probable that the species belongs to the genus Sandracottus, in the neighbourhood of S. 

 Hunteri (No. 1073).— D. S. 



1308. Hydaticus caffer. Boh., Ins. Caffr. I, p. 238. Caffraria. 



" Ovalis, convexiusculus, nitidus, supra flavo-testaceus, subtus ferrugineus ; capite postice nigi-o, cum 

 maculis duabus flavo-testaceis ; prothorace subtiliter punctulato, medio vitta transversa, brevi, nigra • 

 elytris dorso coufertim, confuse uigro-punctatis, lineis tribus tenuibus, fascia transversa pone medium 

 maculaque obsoleta apicali, flavo-testaceis. Long. 13, hit. 7 m.m." 



" Cafii'aria orieutalis et interior." 



\_Thisdiiii/)iosis is followed, I.e., by an extended description.] 



It would seem that the species is probably closely allied to Hydaticus galla (No. 1042). — D. S. 



1309. Hydaticus congestus, Klug, Ins. Mad., p. 13G. Madagascar. 



" H. testaceus, coleoptrorum disco punctis, fascia dorsali maculaque postica confluentibus uigris. Afas. 

 long. lin. 4J." 



" Statura fere Dyt. cinerei, F., at multo minor. Caput fulvum, margine postico lineaque frontali angulari 

 nigris. Thorax fulvus, margine antico et postico nigris. Pectus fulvo-testaceum. Abdomen testaceum, 

 segmentis basi utrinque nigris. Scutellum nigrum. Elytra testacea, punctis lineolisque arcuatis ubique 

 confluentibus, fascia obliqua media maculaque submarginali postica nigris, margine exteruo testaceo 

 immaculato. Pedes testacei." 



The description being confined entirely to colour, I cannot determine whether this is allied to Hydaticus 

 signatipennis (No. 1083) or not. — D. S. 



1310. Hydaticus discoidalis, Hope, Ann. Nat. Hist. XI, 1843, i>. 3G4. Africa occ. 



"Sp. 35, Hydaticus discoidalis, Hoi^e. Long., lin. 5|; lat., lin. 3. AfEnis Hydat. dorsigero, Dupont, 

 at minor. Oblongo-ovalis, thorace obscure testaceo, suturali parte elytrorum nigra, lateribus testaceis, 

 punctis minutisque per discum aspersis, corpore infra ferrugineo, jiecUbus concoloribus." 



It is possible this may prove to be only small Hydaticus dorsiger (No. 1029). — D. S. 



1311. Hydaticus fulvo-notatus, Clk., Tr. Ent. Soc. 18G4, p. 221. Africa occ. 



"Ovalis, depressus, nitidus, niger, fulvo-notatus; capite rufo, ad basin late et transverse nigro; thorace 

 antice excavato, ad basin sinuato-rotundato, lateribus vix rotuudatis, apicem versus transverse leviter 

 l)unctato, nigro, lateribus late flavo-rufis ; scutello triangulari, Isevi, nigro ; elytris latis, subtilissime 

 punctatis, etiamque puuctoruni seriebus 3 nigris ; basi, fascia post media, et apice rufo-flavis ; basis 



TRikNS. Boy. DUB. SOC, N.S., VOL. II. 5 H 



