386 On Aquatic Carnivorous Coleoptera or Dytiscidce. 



361. Sternopriscus clavatus, Wehnckc, n. sp. — Ovalis, sat angustus, sub-opacus, 

 dense subtiliter punctatus, brevissiineque pubescens, rufo-testaceus, pectore 

 infuscato ; prothoraco marginibus aaterioribus (in medio) et posterioribus nigris, 

 striga utriuque obsoletissima ; elytris nigricantibus, testaceo-maculatis ; auteanis in 

 medio fuscis; elytrorum apice subobtuso. 



Mas, major (long. 4 m.m.) antennis ultra medium distortis ; tibiis anterioribus 

 curvatis ; pedibus intermediis leviter elongatis, tarsis crassiusculis 



Fern., minor (long. 3^ m.m.) antennis tibiisque simplicibus. 



Australia, (Sidney). 161. 



362. Sternopriscus tarsalis,n. sp. - Ovalis, angustulus, sub-opacus, testaceus, pectore 

 obscuriore, vertice prothoracisque medio infuscatis, elytris fuscis macidis parvis 

 irregularibus testaceis ; elytris thoraceque dense subtiliter punctatis, hoc utrinque 

 plica distincta, corpore subtus dense punctato. Long. 2|, lat. If m.m. 



In this species there is no trace of any constriction across the middle of the 

 thorax, the base of which is quite as wide as the elytra, the plica on each side is 

 distinct, but not strongly elevated, and there is no transverse depression between 

 the two. 



The only individual 1 have seen of this species is I have no doubt a male. The 

 front tibiae are curved, the front tarsi are distinctly 5-jointed, the three basal joints 

 being dilated ; the middle legs are long, their tibiae slightly curved and their tarsi 

 greatly elongate, the five joints of these are very distinct, the 4th being about as 

 large as the third ; the antennae are rather elongate and slender. 



Australia, (Sidney). 1 62. 



363. Sternopriscus signatus, n. sp. — Ovalis, subopacus, testaceus, prothoracis 

 marginibus anterioribus et posterioribus anguste fuscis, elytris nigro-testaceoque 

 variegatis ; prothorace lateribus rectis, utrinque plica minus distincta, medio obsolete 

 transversim depresso ; corpore toto dense subtiliter punctato, elytris subtiliter 

 pubescentibus. Long. 2^, lat \\ m.m. 



This species is allied rather closely to Sternopriscus tarsalis, but is smaller and 

 less elongate, and the yellow colour is more predominant, and the punctuation is 

 somewhat denser and finer. 



I do not Isnow the sex of the only individual I have seen ; it has the front tibiae 

 rather short but simple, the three basal joints of the front tarsi dilated, the fourth 

 joint short but distinct, the fifth moderately long ; the middle tibiae are rather stout, 

 the basal joints of their tarsi dilated, the fourth joint distinct but not elongate, 



