On Aquatic Carnivorous Coleoptera or Dytiscide. 303 
from the fact that the prosternal process is flatter and less compressed laterally 
than is usual. The only individual I have seen is a female; it has the terminal 
abdominal segment entire and simple. 
Andaman Islands. 1172. 
135. Laccophilus unifasciatus, (Wehncke), n. sp.—Ovalis, subdepressus, nitidus, 
testaceus, elytris castaneis, fascia sub-basali, maculaque ad latera testaceis ; 
prothorace basi in medio evidenter producto. Long. 8, lat. 1: m.m. 
This is one of the smallest species of the genus, and is easily recognized by the 
dark elytra, with a narrow fascia near the base. In the male the hind margin of 
the apical ventral segment is rather obscurely truncate, and projects a very little 
in the middle; in the female it is without sinuation or peculiarity of form: the 
male tarsi are but little incrassate. 
Australia, (Rockhampton). 567. 
Grovr 5. 
136. Laccophilus latifrons, n. sp—Ovalis, minus latus et convexus, pernitidus, 
testaceus, elytris fusco-suffusis, testaceo-variegatis, fascia. flammulata basal 
conspicua. Long. 4, lat. 25 m.m. 
In this species there is on the elytra a yellow fascia near the base, reaching from 
the side margin to the suture, there is a yellow spot on the side about the middle, 
a very irregular interrupted pale tascia behind the middle, and the apex itself is 
rather pale, but is infuscate yellow: the dark colour is irregular, being formed by 
extremely bent and almost diffused lines, so that the spaces separating them are 
very indistinct. The male is more elongate than the female, has the front and 
middle tarsi a little incrassate ; and the apical ventral segment is truncate and 
distinctly produced in the middle so as to appear sinuate on each side. The female 
has the epipleura dilated some distance before the apex, the dilatation being so 
disposed as to form a plica or compressed fold. The apical ventral segment 1S SO 
deeply sinuate on each side of the middle at the apex, as to appear trilobed, the 
middle lobe being however much longer than the lateral ones. 
South America; Santa Rita, Augt. 1850, Sahlberg. 558. 
137. Laccophilus ovatus, n. sp.—Ovalis, minus latus et convexus, pernitidus, 
testaceus, elytris fusco-suffusis, minus distincte testaceo-signatis. Long. 3;, 
lat. 2 m.m. 
The infuscation of the elytra is formed by very indistinct and waved lines, which 
indeed have almost the appearance of irrorations ; the pale spots left unencroached 
on are small and indistinct, and also variable. The male has the front and middle 
