578 On Aquatic Carnivorous Coleoptera or Dytiscide. 
Group 8. (No. 848). 
Elytra with a submarginal stria, and two other strize on each. 
The strize present in this species are those which, if the complement were com- 
plete, would be the sixth and tenth. 
848. Copelatus capensis, (Chev.) n. sp.—Suboblongus, sat depressus, elongatus, 
nitidus, nigricans, capite antertus prothoraceque versus angulos anteriores plus 
minusye dilute rufescentibus, antennis pedibusque testaceis ; elytris versus latera 
striis duabus elongatis, alteraque marginali valde abbreviata, et in disco stria 
quarta plus minusve interrupta et obsoletescente ; prosterno in medio alte compresso- 
carinato, Long. 7, lat. 32 m.m. 
The male differs from the female by its slightly dilated tarsi, and the form of 
the front tibiee which are curved at the base, and are on the inner edge bisinuate 
on their basal portion. 
Caffraria, (Adoo Bush). 689. 
Group 9. (Nos. 849 and 850). 
Elytra with a submarginal stria and five other strize on each. 
The two species although agreeing in the striation of the elytra are probably not 
really allied to one another. 
849. Copelatus doris, n. sp.—Fem., Elongatus, angustulus, subparallelus, minus 
nitidus, subtus rufo-piceus, abdomine piceo, supra piceo-niger, capite, prothoracis 
lateribus elytrorumque basi lateribus et apice dilutioribus ; antennis pedibusque 
testaceis ; elytris striis quinque elongatis, 1* ad 4™ fere eequalibus, quinto paulo 
breviore, striaque marginali anterius valde abbreviata; supra punctulatus, et in 
prothorace elytrisque strigulis brevissimis numerosis ; prosterno in medio fortiter 
compresso-elevato. Long. 54, lat. 22 m.m. 
This isa very distinct species, of which Ihave seen but a single female : the first 
stria is remote from the suture ; the numerous very short scratches on the elytra 
are absent at the apex, and replaced by some distant punctures. 
Borneo, (Sarawak ; found by the Marquis G. Doria in 1865 or 67). 709. 
