On Aquatic Carnivorous Coleoptera or DytiscidcB. 311 



157. Laccopliilus ponticus, n. sp. — Ovalis, sat latus, minus convexiis, pernitidus, 

 rufo-testaceus, prothorace anterius in medio dilute infuscato, elytri.s lineis undulatis 

 nigris, ad basin maculatim interruptis. Long. 4, lat. 21 m.m. 



The specimens of this species at my disposal are in bad condition, and theii- 

 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. — OvalLs, minus convexus, angustus, nitidus, 

 testaceus, elytris lineis flexuosis ante basin desinentibus, ultra medium interruptis 

 et versus apicem irregularibus fuscis. Long. 3|, 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 aj^ex 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, hand elongatus, vix 

 angustus, nitidus, testaceus, elytris lineis flexuosis sat vagis, ante basin late 

 desinentibus, ultra medium interruptis, fuscis. Long. 3l, lat. vix 2 m.m. 



This species is broader in front than Laccophilus obtusus. It has the prothorax 

 immaculate ; the elytra marked with dai'k waved lines, which become dilute 

 anteriorly and are altogether wanting on the basal portion, they also scarcel}' 

 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 

 segfment forming a broad lobe in the middle and sinuate on each side much as in 

 L. obtusus. 



Siatn, Bangkok. 582. 



