388 On Aquatic Carnivorous Coleoptera or Dytiscide. 
Mas, antennis apicem versus incrassatis; tibiis anterioribus leviter curvatis, tarsis 
articulis basalibus fortiter dilatatis ; tarsis intermediis elongatis, articulis basalibus 
subdilatatis. 
Fem., antennis gracilibus ; tarsis anterioribus et intermediis basi sat dilatatis. 
Intermediate between Sternopriscus tarsalis, and Hydroporus multimaculatus (No. 
365), smaller than the former, and with the antennze of the male not so long, and 
the middle tarsi much less elongate : rather broader than Hydroporusmultimaculatus, 
with the yellow colour more predominant on the head and thorax, the sculpture of 
the elytra not quite so fine; with the antennee of the male having the apical joints 
thicker than the middle ones, and the intermediate tarsi a good deal more elungate. 
Australia, (received from Herr Wehncke). 166. 
367. Sternopriscus oscillator, n. sp.—Ovalis, subopacus, densissime punctatus, niger, 
supra testaceo nigroque irregulariter variegatus, pedibus testaceis, antenais basi 
testaceo, apice fusco; prothorace utrinque plica bene elevata, medio leviter 
transversim impresso. Long. 23, lat. 13 m.m. 6. 
Mas, major, antennis longioribus, fere simplicibus, tibiis anterioribus leviter 
curvatis, tarsis evidenter 5-articulatis, articulis basalibus dilatatis; tarsis intermediis 
elongatis articulis basalibus leviter dilatatis. 
Fem., antennis gracilibus brevibus, tarsis anterioribus et intermediis brevioribus 
basi fortiter dilatatis. 
Allied to S. wehnckei, but with the sexes more different ; the male is larger and 
more elcngate than in that species, and the antennze are more elongate and appear 
therefore less thickened towards the apex, the front tarsi are larger and more 
distinctly 5-jointed, and the middle legs are considerably longer and thicker. The 
female is much more like S. wehnckei but the upper surface is of more obscure colour, 
the form is narrower, and the surface not so dull. 
Australia, (Adelaide). 1133. 
368. Sternopriscustasmanicus, n. sp.—Oblongo-ovalis, subopacus,densiuspunctatus, 
niger, supra testaceo-variegatus, prothorace lateribus late testaceis; hoc utrinque 
plica sat elevata, ante basin in medio depresso; antennarum basi pedibusque 
testaceis; antennis versus apicem incrassatis, articulo ultimo presertim latiore, 
angulo apicali interne producto acuto, tibiis anterioribus intus minute emarginato, 
tarsis evidenter 5-articulatis, articulis 3 basalibus dilatatis; pedibus intermediis 
elongatis, parum crassis, tarsis elongatis, superne longe ciliatis. Long. 23, lat. 12 m.m. 
I have seen only a single male of this species ; it may be readily recognized by 
the peculiar incrassation of the terminal joint of the antenne. 
Tasmania. 1134. 
