On Aquatic Carnivorous Coleop/cra or Dytiscidw. 297 



In. this species the elytra are suffased with dark colour, but there is a very- 

 distinct yellow band near the base formed by united (or nearly united) transverse 

 spots, there is a yellow spot close to the side about the middle, and generally 

 another lateral mark extending more towards the suture between this and the 

 apex. The species however is either a very variable one, or the specimens before 

 me from several localities represent more than one species. There is a very slight 

 oblique sinuosity in each sex, on either side of the middle of the last ventral 

 segment ; the male has the front and middle tarsi rather thick : the female has an 

 excessively fine groove on the under edge of the epipleura before the apex. There 

 is no trace of coxal file in either sex. 



South America ; Monte Video, Urugiiay, Parana. 547. 



lis. Laccophilus fumatus, n. sp. — Ovalis, fere angustus, subdepressus, pernitidus, 

 testaceus, el^^tris fuscis, impunctatis, fascia flammulata subbasali, macula laterali 

 apiceque testaceis. Long. 4i, lat. vix 2^ m.m. 



In this species the thorax in the middle of the front and at the base is a little 

 darker. The elytra owing to very diffused irrorations appear brownish ; they have 

 a very distinct yellow band near the base, a yellow mark on the middle of the side 

 margin, another small one on the middle of the suture, and some very minute 

 indistinct pale marks elsewhere, the apex also being pale : the under surface is 

 quite pale. The only individual I have seen is a female, and has the apical ventral 

 segment rather long in the middle, and its outline uninterrupted by any sinuation. 

 There is not the least trace of any coxal file. 



Brazil. 548. 



119. Laccojihilus fractu.s, n. sp.— Ovalis, latiusculus, sat convexus, minus nitidus, 

 rufescens, capite thoraceque dilutioribus, hoc anterius et posterius in medio, 

 elytrisque fusci.s, his impunctatis, signaturis longitudinalibus testaceis. Long. 4|, 

 lat. vix 3 m.m. 



The yellow marks of the elytra consist of a humeral spot and some longitudinal 

 marks internal to it disposed so as to form an interrupted band, of a longitudinal 

 mark near the suture, of some longitudinal marks behind the middle forming an 

 obscure fascia, and of an obscure spot near the lateral margin about the middle, 

 the apex also is paler. The only specimen I have seen is a female ; it has the 

 epipleura quite simple : the last ventral segment is long, and has no sinuation at 

 the sides. The coxas are infuscate in this individual. 



South America; Santa Rita, August, 1850, Sahlberg. 549. 



120. Laf'cophilus vagepictus, n. sp. — Ovahs, subdepressus, minus nitidus. rufescens. 



