On Aquatic Carnivorous Coleoptera or Dytiscide. 623 
pedibusque anterioribus rufis, pedibus posterioribus piceis ; corpore fere leevigato in 
elytris obsoletissime reticulato; prothoracis margine laterali distincto; tarsorum 
posticorum articulis extus fere truncatis. Long. 16, lat. 74 m.m. 
The male has the front and middle tarsi with the three basal joints distinctly 
incrassate but much compressed, and furnished beneath with four series of quite 
small palettes, the marginal hairs only moderately developed, the claws are only 
moderately long, simple and equal. There is no sexual distinction in sculpture. 
South Africa, (Cape of Good Hope). 903. 
957. Colymbetes capensis, Aubé, Rhantus capensis, M.C.—Ovalis, convexus, 
nitidus, subtus piceus, prosterno, pectore medio abdominisque fasciis transversis 
rufescentibus, supra capite thoraceque rufo-testaceis, illo vertice nigro-variegato, 
hujus disco plaga nigra in medio divisa, elytris testaceis, maculis parvis nigris 
creberrime irroratis, antennis pedibusque testaceis, pedibus posterioribus rufis ; 
corpore fere levigato, elytris feminze exterius in parte basali conspicue reticulatis ; 
prothorace margine laterali lato et obsoleto; tarsis posterioribus articulis extus 
breviter lobatis. Long 15, lat. 74 m.m. 
The male has the basal joints of the front and middle tarsi much incrassate and 
compressed, and furnished beneath with moderately large palettes placed on long 
hairs, the marginal hairs very elongate and with curled extremities ; the front claws 
are elongate, the anterior one with its basal portion incrassate, the posterior 
distinctly shorter and nearly simple ; the claws of the middle feet are very unequal 
the outer being much longer and thicker than the more curved inner one. The 
upper surface of this species might be described as smooth, were it not for the 
reticulate sculpture of the outer portion of the elytra in the female; these reticula- 
tions are indistinctly divided into two patches by a smooth space. 
South Africa, (Caffraria). 904. 
958. Rhantus goudoti, (Dej.) n. sp.—Ovalis, convexus, nitidus, subleevigatus, 
subtus nigricans, supra rufus, vertice nigro-variegato, prothorace lateribus palli- 
dioribus, vitta discoidali nigricante, elytris versus suturam nigro-vermiculatis, versus 
latera nigro-irroratis, antennis rufis, pedibus piceo-rufis, posterioribus piceis; pro- 
thorace sine margine laterali; tarsis posterioribus extus vix lobatis. Long. 13%, 
lat. 74 m.m. 
In the male the front tarsi are distinctly incrassate and much compressed, and 
are furnished beneath with four rows of narrow palettes placed on long stalks, the 
marginal hairs inconspicuous, the front claws are very slender and elongate, the 
posterior one is a little shorter than the anterior and has its basal portion more 
arched, and its outline more sinuate; the middle tarsi are clothed beneath in a 
