On Aquatic Carnivorous Coleoptera or Di/tiscidce. 373 



duabus punctorum sat distinctis ; prothoracis angulis posterioribus acutis. Long. 

 4|, lat. 2 J m.m. 



Mas, tarsis anterioribus et intermediis valde dilatatis. 



Fern., tarsis anterioribus et intermediis latis. 



This species has a good deal the form and appearance of a Laccophilus ; the 

 excessively fine punctuation is an important diagnostic of the species. 



South Africa, (Cape Town). 169. 



I 28.— Genus CCELHYDRUS. 



Epipleura much narrowed from the shoulder to the hind margin of the first ventral 

 segment, behind that very slender, and therefore necessarily nearly parallel. Last 

 joint of the front tarsus about as long as the third joint. Prosternal process 

 reaching intercoxal process of the metasternum. 



A single South African species is the only one known. 



331. Coelhydrus brevicollis, n. sp. — S Ovalis, crassiusculus, parumelongatus, subtus 

 convexus, supra sparsim punctatus, ferrugineus, capite thoraceque nitidis, elytris 

 subopacis, pectore nigricante ; coxis posterioribus sparsim sat fortiter punctatis ; 

 tibiis posterioribus calcaribus subsinuatis. Long. 3|-, lat. 2i m.m. 



This species has much the form of Dytiscus confluens {No. 423), but it is larger, 

 more strongly built, comparatively a little broader, and more convex. The three 

 individuals before me, appear all to be males, the front and middle tarsi are rather 

 short, broad, and flat, the basal joint of the front ones is distinctly, of the middle 

 ones strongly dilated. The head has no trace of margin in front, and has only a 

 very scanty punctuation. The thorax is sparingly punctured along the base, almost 

 without punctuation along the middle ; the punctures on the elytra are distant 

 from one another and not coarse, and have some finer very obsolete punctures mixed 

 with them. 



South Africa, (Port Elizabeth, 28th February, 1875, Geo. Lewis). 1138. 



L 29.— Genus DARWINHY DRUS. 



Epipleurse of elytra becoming narrower in a regular and gradual manner from 

 the shoulder to the extremity ; outline of thorax and elytra quite continuous, the 

 latter acutely costate. 



A single peculiar South African species* is the only one known. 



* It is just possible this may be an Australian species. 



3 C 2 



