On Aquatic Carnivorous Coleoptera or Dytiscidce. 295 



which are separate at the base but on the middle are coalesced, the sides are 

 broadly yellow but beyond the middle a dark patch reaches the lateral margin, 

 the aj^ex is quite pale. In the male the front and middle tarsi are much 

 thickened : there is no trace of a coxal file in either sex. 



North America, Texas ; (Colorado fide Crotch). 540. 



111. Laccophilus bifasciatus, Chev. M.C.— Ovalis, latiusculus, subdepressus, 

 glaberrimus. pernitidus, testaceus, pectore, abdomine, prothorace medio elytrisque 

 piceis, his fascia basali lata, altera pone medium apiceque pallidis. Long. 4, lat. 2\ 

 m.m. 



I have examined six specimens of this species ; the sexes are very difficult to 

 distinguish, the male having the tarsi almost as slender as they are in the female, 

 the last ventral sesfment is however not so elonfjate in the former sex as it is in the 

 latter. 



Cuba ; St. Domingo. 541. 



112. Laccophilus simplex, n. sp. — Ovalis, nitidus, rufo-testaceus, capite thoraceque 

 dilutioribus, elytris vix obscurioribus, impunctatis. Long. 3|, lat. 2 m.m. 



There is no coxal file in the male of this species, and the apical ventral segment 

 is also similar, and without sinuation or truncation in either sex ; the male can 

 only be distinguished from the female, by the slightly incrassate front and middle 

 tarsi. 



Brazil, (Sauta Rita, August, 1850, Sahlberg). 543. 



113. Laccophilus i-emator, n. sp. — Ovalis, minus latus ct convexas, nitidus, rufo- 

 testaceus ; elytris fere concoloribus, creberrime subtilissime punctatis. Long, 4, 

 lat. 2 m.m. 



This is a species very destitute of any salient points ; the elytra are without 

 markings, and scarcely differ in colour from the other parts ; the punctuation on 

 the front parts of the elytra can scarcely be distinguished as definite punctures. 

 The only individual I have seen is a female, and has the apical ventral segment 

 quite simply rounded. The species much resembles L. simplex, but is narrower in 

 front, and has the elytra much less smooth. 



South America; Bahia. 554. 



114. Laccophilus traili, n. sp. — Ovalis, sat convexus, nitidus, testaceus, elytris 

 paulo obscurioribus, impunctatis, stria suturali sub-obsoleta. Long. 3f, lat. 2 

 m.m. 



