292 On Aq'iatic Carnivorous Cohoptera or Dyliscidce. 



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.— Oralis, breviusculus, parum convexus, nitidus, 

 testaceus, elytris adspersim infuscatis, margine lateral! anterius apice siguaturisque 

 minutis testaceis. Long. 4, lat. 21 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 tansi 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. 4f , lat. 2l m.m. 



This species is larger than Laccophilus americanus, and of more elongate form, 

 the yellow portions of the elytra arc more extensive being especially broad at the 

 sides anterior to the dark band. Tt is quite as difficult to distinguish from Laccophilus 

 fasciatus (No. 98), but it is narrower in fi'ont, 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. 



Nortli America; Texas, Belfrage. 538. 



104. Laccophilus atristernalis. Crotch, Tr. Am. Ent. Soc. IV., p. 400. — Ovalis, sat 

 convexus, nitidus, testaceus, elytris impunctatis, fere a3qualiter fusco-irroratis, pectore 

 abdomineque nigricautibus. Long. ') 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 ^\■ith 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. 



