296 On Aquatic Carnivorous Coleoptera or Dytiscide. 
The male is without coxal file, but the last abdominal segment is deeply and 
broadly excised, while in the female it is excised on each side, the middle part 
forming a somewhat plicate projecting lobe. 
Although excessively similar to L. simplex, this species is very distinct from it 
by the sexual structure of the last abdominal segment. It possesses also on the 
elytra an obscure sutural stria, formed by nearly or quite coalescent impressed 
punctures ; the under surface is perfectly smooth, even the basal abdominal segments 
possess no visible scratches. 
South America ; Amazons, Montealagre, 1-13, 11. 1873, Professor Trail. 1121. 
115. Laccophilus venustus, Chev. M.C.—Ovalis, fere angustus, subdepressus, 
pernitidus, leevigatus, testaceus, prothorace anterius in medio triangulariter infuscato, 
elytris fusco-nebulosis, fascia maculari subbasali signaturisque parvis testaceis. 
Long. 3% m.m., lat. 2 m.m. 
In this species the elytra are suffused with dark colour in an unequal or spotty 
manner, and there is a conspicuous pale fascia composed of united spots near the 
base, there is also a pale mark at the sides and a very broken fascia of pale marks 
before the apex. The only individual I have seen is the type from Chevrolat’s 
collection ; it is a female and appears to be very closely allied to L. suffusus (No. 
107), but is narrower, and the colouration is a little different. 
Cuba, (Coll. Brussels Mus.) ; (Mexico?) 560. 
116. Laccophilus subsignatus, n. sp.—Ovalis, sat latus, minus convexus, perni- 
tidus, rufo-testaceus, prothorace basi medio elytrisque fuscis, his fascia subbasali 
aliaque ante-apicali et apice testaceis; corpore subtus plus minusve infuscato. 
Long. 33, lat. 25 m.m. 
The markings of the elytra in this species are rather vague and indistinct ; besides 
the two irregular fascize the lateral margin is paler. The sexes are very difficult 
to distinguish, there being scarcely any incrassation of the male tarsi, and the 
ventral segment is simply curved at the sides, and similar in the two sexes. ‘The 
species bears a very great resemblance to L. suffusus (No. 107) so that I was long 
before I discriminated them ; the present species is however rather larger, has the 
prosternal process much longer, and the male has no coxal file. 
South America, and the Antilles ; Venezuela, Guadeloupe. 571. 
117. Laccophilus notatus, Boh. M.C.—Ovalis, sat latus et convexus, nitidus, 
testaceus, prothorace anterius in medio et posterius elytrisque fuscis, his fere 
impunctatis, fascia subbasali conspicua maculisque ad latera testaceis. Long. 4, 
lat. 22 m.m. 
