292 On Aquatic Carnivorous Coleoptera or Dytiscide. 
This species is very closely allied to Dytiscus maculosus (No. 92), but is much 
smaller, and the markings of the elytra are much less distinct. It is a variable species 
in size, and the individuals from the United States are generally smaller than those 
from the Antilles. The sexual characters are much the same as in Dytiscus macu- 
losus; the coxal file is rather coarse in the male, excessively fine in the female. 
North America and the Antilles; Alabama, Louisiana, Texas, Mexico; Antigua, Cuba. 537. 
102. Laccophilus confusus, n. sp.—Ovalis, breviusculus, parum convexus, nitidus, 
testaceus, elytris adspersim infuscatis, margine laterali anterius apice signaturisque 
minutis testaceis. Long. 4, lat. 2+ m.m. 
This insect is much smaller than the preceding ones (L. americanus, &c.), to which 
it is allied ; the infuscate dots, though denser behind and ceasing abruptly before 
the apex, do not form a distinct band, the yellow marks formed by the absence of 
the dots from several places are of the same nature as in the allied species, and are 
principally distinct near the base. 
The male has the front and middle tarsi much incrassate, and the coxal file 
although distinct is quite fine ; the female I have not seen. 
Although very similar to L. americanus the species is distinct by the much smaller 
size and finer coxal file in the male. 
Mexico. 1171. 
103. Laccophilus terminalis, n. sp.—Ovalis, minus latus, sat convexus, nitidus, 
testaceus, elytris impunctatis, intricater nigro-signatis, signaturis pone medium 
fasciam transversam sat distinctam formantibus. Long. 4%, lat. 23 m.m. 
This species is larger than Laccophilus americanus, and of more elongate form, 
the yellow portions of the elytra are more extensive being especially broad at the 
sides anterior to the dark band. It is quite as difficult to distinguish from Laccophilus 
fasciatus (No. 98), but it is narrower in front, more convex, with the black marks on 
the anterior portions of the elytra more developed, and the transverse posterior 
fascia less complete. The sexual differences seem the same as in the allied species. 
North America ; Texas, Belfrage. 538. 
104. Laccophilus atristernalis, Crotch, Tr. Am. Ent. Soc. LV., p. 400.—Ovalis, sat 
convexus, nitidus, testaceus, elytris impunctatis, fere zequaliter fusco-irroratis, pectore 
abdomineque nigricantibus. Long. 5 m.m. lat. 3 m.m. 
‘The elytra in this species appear at first sight nearly unicolorous, this is caused 
by their being densely irrorated with brownish dots; the margins and apex are 
however paler, and there may be distinguished at the sides two extensions of the 
unspotted marks, forming indistinct lateral spots. 
