On Aquatic Carnivorous Coleoptera or Dytiscidai. ;303 



from the fact that the prosternal process is flatter and less compressed laterally 

 than is usual. The only individual I have seen is a female ; it has the terminal 

 abdominal segment entire and simple. 



Andaman Islands. 1172. 



135. Laccophilus unifasciatus, (Wehncke), n. sp. — Ovalis, subdepressus, nitidus, 

 testaceus, elytris castaneis, fascia sub-basali, maculaque ad latera testaceis ; 

 prothorace basi in medio evidenter ^Jroducto. Long. 3, lat. It m.m. 



This is one of the smallest species of the genus, and is easily recognized by the 

 dark elytra, with a narrow fascia near the base. In the male the hind margin of 

 the apical ventral segment is rather obscurely truncate, and projects a very little 

 in the middle ; in the female it is without sinuation or peculiarity of form : the 

 male tarsi are but little incrassate. 



Australia, (Rockliamptou). 56". 



Group 5. 



136. Laccophilus latifrons, n. sp. — Ovalis, minus latus et convexus, pernitidus, 

 testaceus, elytris fusco suffusis, testaceo-variegatis, fascia flammulata basali 

 cons^jicua. Long. 4, lat. 2i m.m. 



In this species there is on the elytra a yellow fascia near the base, reaching from 

 the side margin to the suture, tliere is a yellow spot on the side about the middle. 

 a very irregular interrupted pale fascia behind the middle, and the apex itself i.s 

 rather pale, but is infuscate yellow : the dark colour is irregular, being formed by 

 extremely bent and almost diffused lines, so that the spaces separating them are 

 very indistinct. The male is more elongate than the female, has the front and 

 middle tarsi a little incrassate ; and the apical ventral segment is truncate and 

 distinctly produced in the middle so as to appear sinuate on each side. The female 

 has the epipleura dilated some distance before the apex, tlie dilatation being so 

 disposed as to form a plica or compressed fold. The apical ventral segment is so 

 deeply sinuate on each side of the middle at the apex, as to appear trilobed, th^' 

 middle lobe beinsf however much longjer than the lateral ones. 



South America ; Santa Rit:i, Augt. 1850, Salilbcrg. 558. 



137. Laccophilus ovatus, n. sp. — Ovalis, minus latus et convexus, 23ernitidu8, 

 testaceus, elytris fusco-suffusis, nunus distincte testaceo-signatis. Long. 3ri, 

 lat. 2 m.m. 



The infuscation of the elytra is formed by very indistinct and waved lines, which 

 indeed have almost tlie appearance of irroi-ations ; the pale spots left unencroacheJ 

 on are small and indistinct, and also variable. The male has the front and middle 



