On Aquatic Carnivorous Coleoptera or Dytiscida. 373 
duabus punctorum sat distinctis ; prothoracis angulis posterioribus acutis. Long. 
AZ, lat. 23 m.m. 
Mas, tarsis anterioribus et intermediis valde dilatatis. 
Fem., 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 C#HLH YDRUS. 
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.—¢ 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. 24 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 marginin 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. 
I. 29.— Genus DARWINHY DRUS. 
Epipleure 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. 
8 C2 
