On Aquatic Carnivorous Coleojptera or DytiscidoB. 3] 3 



163. Laccophilus clarki, (Wehncke), n. sp. — Ovalis, minus convexus, angustus, 

 uitiJus, testaceus, protliorace anteiius et posterius in medio nigricante, elytris 

 lineis undulatis fere integris. Long. 3|, lat. vix 2 m.m. 



This is a small narrow species, witli the dark marks on the elytra largely 

 developed and distinct ; they consist of thick lines waved at their edges, and only 

 separated by very narrow yellow marks, and are indeed here and there quite 

 confluent ; near the base and beyond the middle in some places the black marks 

 are somewhat reduced however so as to give rise to a slight appearance of a pale 

 spot or two near the base and of a pale fascia beyond the middle ; the under 

 surface is more or less infuscate. The male has the front and middle tai'si a crood 

 deal incrassate. and the apical ventral segment somewhat produced in the middle 

 and sinuate on each side ; in the female the hind part of the segment forms a 

 broad much produced lobe, and the extreme sides are slightly prominent, so that 

 close to the sides the hind mai'gin appears deeply sinuate. 



Australia ; Rockhampton, Gayndah, Moreton Bay. 581. 



164. Laccophilus quadrimaculatus, (Wehncke) n. sp. — Ovalis, convexus, nitidus, 

 testaceus, niger, capite, thorace, antennis pedibusque quatuor anterioribus testaceis, 

 thorace basi breviter nigro ; elytris in medio macula parva laterali, aliaque post 

 medium majore rufis, apice piceo, pedibus posterioribus piceis. Long. 31, m.m., 

 lat ll m.m. 



I have seen only a single female of this easily distinguished species, the apical 

 ventral segment is prolonged so as to be very oblique on each side. 



Australia (Wehncke). 623. 



165. Laccophilus lituratus, n. sp. — Ovalis, sat latus, subdepressus, nitidus, testaceus, 

 elytris fuscis, fascia sub-basali conspicua, maculisque duabus ad latera, testaceis. 

 Long. 3, lat. If m.m. 



The elytra are in this species fuscous without trace of irroration or flexuous lines, 

 there is a very conspicuous pallid fascia near their base, a pale spot at the side about 

 the middle, and a pale s2)ot beyond this which extends further inwards towards the 

 suture. The male I do not know ; the female has the last ventral segment elongate, 

 not at all truncate, and the outline of its hind part at the side a simple curve. 



Siam. 592. 



166. Laccophilus pulicarius, n. sp. — Ovalis, sat latus et convexus, nitidus, 

 testaceus, abdomine elytrisque nigricantibus, his faciis duabus transversis, apiceque 

 testaceis. Long, (elytrorum) 2 m.m. 



