On Aquntic Carnivorous Coleoptera or DijtiscidxB. 609 



presso; metasterni lateribus brevibus; tarsis posteiioribus elongatis, unguiculis 

 valde insequalibus. Long. 10, lat. 5 m.m. 



The male has the front tarsi rather broadly dilated, and not compressed, the 

 fourth joint being triangular; they are clothed beneath with four series of narrow 

 palettes, and on the basal portion wdth short setae ; their claws are rather short and 

 stout, and strongly curved, the front one being rather shorter than the hind one; 

 the middle tarsi are also dilated and clothed like the front feet, their fifth joint is 

 elongate, but the claws are wanting in the only specimen known. The female is 

 unknown. 



New Zealand, (Dunedin, Castlenau). 870. 



924. Colymbetes pulverosus, Steph., RJiantus jyulverosus, M.C. — Ovalis, hand 

 convexus, nitidus, subtus niger, prosterni processu plus minusve dilutiore, antennis 

 pedibusque anterioribus testaceis, pedibus posterioribus piceis, supra testaceus, 

 vertice nigro rufoque variegato, thorace in medio macula transversa fusco-nigra, 

 elytris creberime nigro-irroratis ; tarsis posterioribus baud elongatis, articulo quarto 

 inferne baud posterius lobato-producto, unguiculo interno quam externo vix duplo 

 lonofiore. Lon^ij. 12, lat. 6i m.m. 



The male has the basal joints of the front and middle tarsi a little incrassate 

 and very compressed, and fui-nished beneath with four rows of narrow elongate 

 palettes, the marginal hairs are but little developed ; the claws on the front feet are 

 short but unequal, the anterior one is a little the longer, and is swollen at the base 

 and bent at a little distance beyond the swelling so as to give the appearance of an 

 emai-gination close to the base, the hinder one is shorter and its basal thickening 

 extends for about half the length of the claw; the claws of the middle tarsi are longer 

 than those of the front feet, and are rather slender and nearly equal, the inner 

 onft however is rather shorter than the other, and is distinctly bisinuate beneath. 



The Australian specimens are generally larger and in proportion narrower than 

 those from other localities, and often have the front claw^ on the middle male feet 

 thicker ; these differences however are neither important nor constant. 



Australia, very abundant ; New Zealand, common ; New Caledonia, common ; South Japan, China, Java, 

 Assam, Himalaya, Mesopotamia, Egypt, Algeria, Southern and Central Europe, but wanting or extremely 

 rare in Northern Europe. 873. 



925. Rhantus elevatus, n. sp. — Ovalis, latiusculus, sat convexus, nitidus, subtus 

 niger, prosterno rufescente, antennis pedibusque anterioribus testaceis, posterioribus 

 piceis, supra testaceus, capite posterius nigro, rufo-bimaculato, prothorace in medio 

 transvertim fuscescente, elytris creberrime nigro-irroratis ; tarsis posterioribus 

 brevibus, articulo quarto inferne leviter posterius lobato-producto, unguiculo interno 

 quam externo baud duplo longiore. Long. 11?, lat. 6 m.m. 



