On Aquatic Carnivorous Coleoptera or Dytiscide. 385 
The species are best distinguished by the sexual characters, which are frequently 
extraordinary ; the males of some species are twice the bulk of the females, and 
may be the possessors of extraordinary structures on their antennze and middle 
legs. They are peculiar to Australia.* 
359. Sternopriscus browni, n. sp.—Oblongo-ovalis, subopacus, dense subtiliter punc- 
tatus subtiliterque pubescens, nigricans, capite fusco obscure testaceo-maculato, 
prothorace testaceo medio late infuscato, utrinque striga impressa, elytris fuscis 
indistincte testaceo-maculatis, antennis pedibusque fusco-testaceis ; corpore subtus 
dense sequaliterque punctato. 
Mas, major, (long. 8s m.m.) antennis articulis 2 et 3 elongatis, 4 et 5 brevibus, 6 
sat elongato, 7-11 distortis ; tibiisanterioribus leviter curvatis, intus emarginatis ; 
pedibus intermediis elongatis, femoribus longius ciliatis, tibiis curvatis, tarsis 
articulis 4 et 5, (4° magno, 5° dilatato) externe spongiosis interne glabris; tarsis 
posterioribus crassis utrinque longius ciliatis. 
Fem., minor, (long. 22 m.m.) antennis pedibusque simplicibus. 
Head very finely but somewhat closely punctured, fuscous but with some 
indistinct spots on the front, and a still more indistinct one on the vertex, yellowish. 
Thorax and elytra densely and finely punctured ; sides of the thorax nearly straight, 
the middle of the base forming a very evident angular projection, Elytra rather 
rounded at the sides, and deflexed towards their apex which is rather pointed. 
Australia, (King George’s Sound). Given by the lamented Edwin Brown. 159. 
360. Sternopriscus obscurus, n. sp.—P?, Ovalis, opacus, dense subtilissime punctatus 
subtiliterque pubescens, nigricans, capite, prothorace, antennis pedibusque obscure 
fusco-rufis ; corpore subtus dense, zequaliter, subtiliterque punctato. Long. 3 m.m. 
I am only acquainted with the female of this species, which is very similar to 
the female of S. browni, but differs as follows: S. obscurus is rather larger and 
broader, and more obscurely coloured, and rather more finely punctured, and the 
antennee and the apical joints of the front and middle tarsi are more elongate. 
The male will probably prove to have some difference in its sexual characters from 
those of S. brown. 
Australia, (King George’s Sound). 160. 
*TIn addition to the ten species of which descriptions follow, there is yet another that should be 
included in the genus, viz., Hydroporus hansardi, Clk., (No. 1,376 huj. op.), near No. 361. 
