On Aquatic Carnivorous Coleoptera or Dytiscide. 409 
transversim in medio, elytrorum signaturis, entennis pedibusque rufescentibus ; 
clypeo antice rotundato, sed vix marginato, capite dense strigoso-punctato ; thorace 
elytrisque crebre fortiter punctatis ; corpore sul tus fortiter punctato. Long. 32, 
lat. 2 m.m. 
The marks on the elytra consist of a broad irregular sub-basal fascia which does 
not quite reach the suture, and some irregular marks towards the extremity which 
vary in their extent. 
The four individuals I have examined all have the tarsi simple. 
Australia, (New South Wales, Sidney). 190. 
425. Chostonectes latus, n. sp.—Ovalis, latiusculus, sat convexus, posterius sub- 
acuminatus, subopacus, evidenter pubescens, nigricans, capite, thoracis lateribus, 
elytrorum signaturis basalibus et externis, antennis pedibusque ferrugineis ; clypeo 
-antice rotundato sed vix marginato, capite crebre punctato; thorace elytrisque 
crebre sat fortiter punctatis; corpore subtus fortiter punctato. Lone. 44, lat. 
26 M.m. 
Mas, tarsis anterioribus et intermediis articulis sat fortiter dilatatis. 
Fem., tarsis anterioribus et intermediis latiusculis, articulis basalibus haud 
dilatatis. 
Australia, (Victoria, Mons Macedon). 191. 
426. Hydroporus nebulosus, Macleay, Tr. N.S.W. 1871, p. 123.—Late ovalis, 
brevis, sat convexus, opacus, evidenter pubescens, ferrugineus, elytris ferrugineo 
fuscoque obscure variegatis; clypeo rotundato, sat distincte marginato, capite 
“subtiliter striguloso; elytris crebre fortiter minus profunde punctatis, corpore 
subtus fortiter punctato. Long. 33, lat. 23, m.m. 
The three individuals I have seen of this species have the tarsi slender, and are 
_ perhaps females. 
Australia, (Sidney). 189. 
427, Hydroporus gigas, Boh., M.C.—Ovalis, sat latus et convexus, subnitidus, 
evidenter pubescens, pectore abdomine, antennis pedibusque rufis, supra nigricans, 
capite anterius et in medio, prothorace lateribus, elytris fascia interrupta basali 
maculisque externis ferrugineis; corpore creberrime sat fortiter fere squaliter 
punctato ; clypeo anterius subrotundato, indistincte incrassato, sed haud marginato, 
Long. 6%, lat. 33, m.m. 
Mas, tarsis anterioribus et intermediis bene dilatatis parallelis, unguiculis 
(preesertim anterioribus) magis elongatis. 
Australia and Tasmania, (Clarence River, Melbourne, Sidney). 192. 
