312 On Aquatic Carnivorous Coleoptera or Dytiscide. 
160. Laccophilus parvulus, Aubé. M.C.—Ovalis, minus convexus, nitidus, 
testaceus, elytris disco lineis undulatis valde abbreviatis suturaque fuscis, abdomine 
obscuro. Long. 332, lat. 2 m.m. 
This is a small species, comparatively little narrowed in front, and with the dark 
marks on the elytra reduced to some (about five) very short flexuous lines on the 
middle, so that they leave a considerable space at the base, and all the apical half 
immaculate, the suture however is dark for the greater part of its length; and in 
some specimens these marks take a much greater development, so that there may 
be a subapical patch of small marks, and also some small irregular marks close to 
the base, the central batch of marks still remaining more or less distinct from the 
smaller basal and apical ones. In the male the front and middle tarsi are 
moderately incrassate and the apical ventral segment is a good deal produced in 
the middle and sinuate on each side; in the female the apical portion of the 
segments forms a broader and more prominent lobe in the middle than it does in 
the male, and is a little more distinctly sinuate close to the outer angle. 
I am by no means sure that this is really the species described by Aubé as L. 
parvulus. 
Sumatra. 621. 
161. Laccophilus, dispersus, n. sp.—Ovalis, sat latus, brevis, nitidus, testaceus ; 
elytris lineis flexuosis ante basin late desinentibus, ultra medium interruptis fuscis. 
Long. 3, lat. 1 m.m. 
This species is again closely allied to L. derasus, but is considerably smaller and 
less elongate; the marks on the elytra are well defined, but similar to those of 
L. derasus. I have seen but a single male;it has the front and middle tarsi 
distinctly incrassate, and the apical ventral segment is a good deal produced in the 
middle, and sinuate on each side. 
Siam, Bangkok. 683. 
162. Laccophilus undulifer, Motsch. M.C.—Ovalis, minus convexus, nitidus, 
testaceus, elytris lineis duplicatis undulatis, minus abbreviatis fuscis, lateribus 
immaculatis ; corpore subtus leviter infuscato. Long. 33 m.m. lat. 1§ m.m. 
In this species the lines of the elytra consist of distinct pairs, and nearly attain 
the base and the apex, the sutural one being however more abbreviate in front 
than the others; these lines are quite wanting at the sides. J have seen only one 
individual in very bad condition ; it is a female, and has the apical ventral segment 
forming a very broad and very short projection in the middle, so as to be slightly 
sinuate on each side, but the outer angles do not appear to be projecting. 
Madras, (Wehncke). 622. 
