566 On Aquatic Carnivorous Coleoptera or Dytiscide. 
as well as the basal portion of the elytra, covered with regular, fine, short, distinct 
longitudinal impressions. 
Australia and Tasmania, (Melbourne). 666, 
814. Copelatus ater, n. sp.—Ovalis, minus angustus, subdepressus, niger, capite 
thoraceque ad angulos anteriores piceo-rufis, antennis pedibusque rufis; prothorace 
ad latera subtilissime strigoso-punctato ; elytris crebre evidenter punctatis, seriebus 
punctorum sub-distinctis; coxis posterioribus fortiter crebreque strigosis. Long. 
Hie, eye, See mason, 
The male has the front and middle tarsi a good deal dilated ; the anterior claw of 
the front foot is thicker than the other, and is straight beneath, and has an extremely 
short, slender termination; there is no difference in the sculpture of the two sexes, 
except that the female has the strigose punctuation at the sides of the thorax just 
perceptibly more distinct. The species is about the size of the Kuropean Dytiscus 
agilis (No. 825), but is broader and less parallel ; of all the Copelati it is the species 
most resembling an Agabus by the superficial characters of colour, form, and 
sculpture. 
Australia, (Swan River, K. George Sound). 668. 
815. Copelatus extensus, n. sp.—lem., Oblengo-ovalis, elongatus, niger, thorace 
ad latera picescente, antennis pedibusque rufis; elytris seriebus punctorum distinctis, 
absque strigulis; coxis posterioribus strigulis crebribus profundis. Long. 10, lat. 
43 m.m. 
There are only a very few insignificant scratches on the thorax, and none at all 
on the elytra. I have only seen a single individual: though it much resembles at 
first sight C. acuductus (No. 819), it is very distinct therefrom by the sculpture of 
the thorax and elytra, 
Australia, (Brisbane), 669. 
816. Copelatus maculatus (Wehncke), n. sp.—Fem., Oblongo-ovalis, elongatus, sat 
depressus, minus nitidus, mger, prothoracis lateribus picescentibus, elytris apice 
rufo-maculatis, antennis pedibusque rufis; capite crebre evidenter punctato ; thorace 
medio levigato, versus latera strigulis omnium brevissimis parcioribus; elytris 
strigulis brevissimis numerosis undique fere equaliter ornatis, Long. 6%, lat. 
T have seen only a single, very mutilated, individual of the female sex. 
New Caledonia. 683. 
