On Aquatic Carnvorous Coleoptera or Dytiscide. 311 
157. Laccophilus ponticus, n. sp.—Ovalis, sat latus, minus convexus, pernitidus, 
rufo-testaceus, prothorace anterius in medio dilute infuscato, elytris lineis undulatis 
nigris, ad basin maculatim interruptis. Long. 4, lat. 24 m.m. 
The specimens of this species at my disposal are in bad condition, and their 
colour therefore rather indistinct: the prothorax is only indistinctly infuscate on 
the front margin, and at the base there seems to be a small spot on each side of 
the middle. The lines on the elytra are thick lines extremely waved, not 
interrupted beyond the middle, but more or less broken near the base so as to 
cause there some spots. The male has the front and middle tarsi a good deal 
incrassate : and the apical ventral segment truncate but much produced and acumi- 
nate in the middle, so as to appear rather deeply sinuate on each side; in the 
female the middle part of the segment is still longer, and the lateral oblique sinua- 
tions are not very distinct. 
Mesopotamia. 580. 
158. Laccophilus obtusus, n. sp.—Ovalis, minus convexus, angustus, nitidus, 
testaceus, elytris lineis flexuosis ante basin desinentibus, ultra medium interruptis 
et versus apicem irrevularibus fuscis. Long. 33, lat. 2 m.m. 
The thorax is immaculate ; the elytra are marked with flexuous lines, which leave 
the basal part untouched, though near the shoulder and the suture they reach close 
to the base; these lines in their front portions consist of pairs, but towards the 
apex are irregular and become more like irrorations, before the apex they are 
interrupted by a pale space extending from the sides but not reaching the suture. 
The male has the front and middle tarsi much incrassate, and the apical ventral 
segment a good deal produced in the middle and sinuate on each side : in the female 
the middle portion of the segment is still more elongate. 
Singapore. 581. 
159. Laccophilus derasus, n. sp.—Ovalis, minus convexus, haud elongatus, vix 
angustus, nitidus, testaceus, elytris lineis flexuosis sat vagis, ante basin late 
desinentibus, ultra medium interruptis, fuscis. Long. 34, lat. vix 2 m.m. 
This species is broader in front than Laccophilus obtusus. It has the prothorax 
immaculate; the elytra marked with dark waved lines, which become dilute 
anteriorly and are altogether wanting on the basal portion, they also scarcely 
extend to the apex, and are interrupted beyond the middle by a pale space extend- 
ing from the sides. I have seen only the female, which has the apical ventral 
seement forming a broad lobe in the middle and sinuate on each side much as in 
L. obtusus. 
Siam, Bangkok. 582. 
