On Aquatic Carnivorous Coleoptera or Dytiscide. 585 
867. Copelatus clarki (Wehncke), n. sp.—Ovalis, elongatus, sat depressus 
piceus, capite prothoracisque lateribus dilutioribus, antennis pedibusque testaceis ; 
elytris striis plurimis (circiter septem) posterius abbreviatis, alternis subtilioribus et 
versus apicem brevioribus, aliaqyue marginali brevissima. Long. 7, lat. 34 mom. 
In this species the first stria is remote from the suture, and the other strize are 
narrowly separated from one another, the interval between the first and second 
being however double that between the others, because the intervening stria is absent, 
or is represented only by some widely separated linear marks. The male has the 
front and middle tarsi greatly dilated, the front tibize slightly curved at the base, 
so that the basal portion is a little more slender and is sughtly sinuate internally. 
The sculpture does not differ in the sexes. 
Australia, (Cape York). 676. 
868. Copelatus carinatus, n. sp.—em., Oblongo-ovalis, vix angustulus vel elon- 
gatus, minus depressus, sat nitidus, piceus, supra nigro-piceus, vapite et prothoracis 
elytrorumque lateribus dilutioribus, antennis pedibusque rufis; prothorace strigulis 
subtilissimis paucis; elytris strus octo subtilibus, interna a sutura remota, 2°, 4’, 
6*que posterius multo brevioribus; striaque marginali brevissima; prosterno in 
medio alte compresso-carinato. Long. 7, lat, 3§ m.m. 
The strize of the elytra are rather peculiar in this species, there are eight distinct 
fine striz on each wing-case the first of which is placed far from the suture; between 
it and the suture there is however, quite at the base, the commencement of another 
stria ; the 2nd, 4th, and 6th strize are much shorter behind than the others, while the 
7th is obsolete in front. J have seen only a single individual. 
Africa, (Guinée Portugaise, coll. Bonvouloir). 705. 
Group 12. (Nos. 869 to 886). 
Elytra with a submarginal stria and nine or ten other strize on each. 
In Nos. 869 and 870, the second stria is nearly er altogether wanting, and the first 
is much abbreviate at the base ; in the other species the ten striz are present, but 
some of them (especially the internal ones) may be more or less abbreviate at the 
base. 
869. Copelatus prolongatus, n. sp.—Robustus, ovalis, sat latus et elongatus, 
nitidior, niger, capite piceo, prothorace lateribus anguste ferrugineis, elytris apice 
sordide testaceo; antennis pedibusque rufis; prothorace maris fere levigato, 
