On Aquatic Carnivorous Coleoptera or Dytiscide. 779 
is remarkable also by its broadly flavous or testaceous thorax combined with the uniform blackness of 
the elytra, relieved only by the broad and evenly-disposed flavous margination, which extends from the 
humeral angles nearly to the apex.” 
“T obtained a single example some years ago in the Gory collection, from China.” 
1307. Hydaticus baeri, Regt., Ann. Soc. Fr., 1877, p. xxvii. Manilla. 
«“ Ovalis, sat latus, parum convexus ; supra flavo-testaceus, capite in vertice et circum oculos et lineis 
duabus curvis, prothorace late antice et postice, elytris vittis duabus transversis latissimis suturaque ad 
apicem flayvo-guttata nigro-ornatis ; subtus niger vix ferrugineus ; pedibus testaceis preter posticis nigro- 
ferrugineis. Long. 13 m.m.” 
[This diagnosis is supplemented (op. cit., p. 355) by an extended description. | 
It appears probable that the species belongs to the genus Sandracottus, in the neighbourhood of 8. 
Hunteri (No. 1073).—D. 8. 
1308. Hydaticus caffer, Boh., Ins. Caffr. I, p. 238. Caffraria. 
“ Ovalis, convexiusculus, nitidus, supra flavo-testaceus, subtus ferrugineus ; capite postice nigro, cum 
maculis duabus flavo-testaceis ; prothorace subtiliter punctulato, medio vitta transversa, brevi, nigra ; 
elytris dorso confertim, confuse nigro-punctatis, lineis tribus tenuibus, fascia transversa pone medium 
maculaque obsoleta apicali, flavo-testaceis, Long. 13, lat. 7 m.m.” 
“ Caffraria orientalis et interior.” 
[ This diagnosis is followed, l.c., by an extended description. | 
It would seem that the species is probably closely allied to Hydaticus galla (No. 1042).—D. 8. 
1309. Hydaticus congestus, Klug, Ins. Mad., p. 136. Madagascar. 
“FH. testaceus, coleoptrorum disco punctis, fascia dorsali maculaque postica confluentibus nigris. Aas. 
= 1” 
long. lin. 44. 
“ 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 externo 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. 8. 
1310. Hydaticus discoidalis, Hope, Ann. Nat. Hist. XI, 1843, p. 364. Africa oce. 
“Sp, 35, Hydaticus discoidalis, Hope. Long., lin. 54; lat., lin. 3. Affinis Hydat. dorsigero, Dupont, 
at minor. Oblongo-ovalis, thorace obscure testaceo, suturali parte elytrorum nigra, lateribus testaceis, 
punctis minutisque per discum aspersis, corpore infra ferrugineo, pedibus concoloribus.” 
It is possible this may prove to be only small Hydaticus dorsiger (No. 1029).—D. 8. 
1311. Hydaticus fulvo-notatus, Clk., Tr. Ent. Soc. 1864, p. 221. Africa occ. 
“Qvyalis, depressus, nitidus, niger, fulvo-notatus ; capite rufo, ad basin late et transverse nigro; thorace 
antice excavato, ad basin sinuato-rotundato, lateribus vix rotundatis, apicem versus transverse leviter 
punctato, nigro, lateribus late flavo-rufis ; scutello triangulari, levi, nigro; elytris latis, subtilissime 
punctatis, etiamque punctorum seriebus 3 nigris; basi, fascia post media, et apice rufo-flavis ; basis 
TRANS. ROY. DUB, SOC., N.S., VOL. II. 5 H 
