294 On Aquatic Carnivorous Coleoptera or Dijtiscidw. 



the hind coxse are infuscate to a variable extent. The male has a conspicuous 

 coxal file of unusually coarse impressions. There is no sinuation of the apical 

 ventral segment in either sex. 



South America ; Bahia. 542. 



108. Laccophilus badeni, (Wehncke), n. sp. — Ovalis, latiusculus, sat convexus, 

 minus nitidus, fusco-testaceus, pectore nigricante, elytris fuscis, prothorace 

 lateribus elytrisque signaturis (quarum fascia subbasali flammulata conspicua) 

 testaceis. Long. Al, lat. 3 m.m. 



There is in this species, near the base of the elytra, a conspicuous yellow band 

 •which in two or three places is more or less completely divided by prolongations 

 of the dark colour, and with the band is connected a very slender longitudinal pale 

 •stripe near the suture ; there is also a pale mark at the side near the middle, and 

 several irregular pale marks forming a transverse interrupted fascia in front of the 

 apex, and the apex itself is pale. The elytra have rather a dull silky appearance. 

 The male shows an excessively fine coxal file (it is as difhcult to see as that of the 

 female Dytiscus maculosus) ; its apical ventral segment is not sinuate at the sides ; 

 the front and middle tarsi are distinctly thickened. In the female the epipleurse 

 are not inflexed near the apex, but become broader at some distance before the 

 apex, and then rather abruptly narrow, so that when looked at from the side, 

 the edge of the wing-case appears sinuate near the apex. 



Brazil, (fide Welincke). 552. 



109. Laccophilus nigricans, u. sp. — Ovalis, angustulus, sat convexus, nigricans, 

 antennis, pedibus, capite anterius, et prothoracis lateribus testaceis ; elytris fere 

 impunctatis, lateribus anterius dilutioribus, ad humeros testaceis. Long. 31, 

 lat. 2 m.m. 



The small size and dark colour of this species readily distinguish it. The only 

 individual I have seen is a male, it has the front and middle tarsi a good deal 

 incrassate ; there is a fine, indistinct coxal file ; the apical venti'al segment is not 

 at all sinuate at the sides. 



Soutli America ; Parana. 553. 



Group 2. 



110. Laccophilus quadrilineatus, Horn. Tr. Am. Ent. Soc. 1S71, p. 330. — Ovalis, 

 elongatus, sat convexus, nitidus, testaceus, elytris Isevigatis, late irregulariter 

 fusco-signatis, signaturis antice in lineas divisis ; prothorace basi medio acutius 

 producto. Long. 6 m.m., lat. 3 m.m. 



In this species the marks of the elytra consist of some longitudinal linear marks. 



