On Aquatic Carnivorous Coleoplera or Dytiscida. 581 



abbreviated there ; at the base thore may be seen between the strife some short 

 marks or scratches representing rudimentary intermediate strise. In this species 

 the lateral part of the wing-case is darker than the other parts. T have seen only 

 the female. 



Celebes. 693. 



8oG. Colymbetes lineatus, Guer., M.C. — Fern., Ovalis, sat angustus et elongatus, 

 piceus, supra nigricans, capite prothoracisque lateribus dilutioribus, elytris ad 

 apicera testaceo-maculatis, antennis pedibusque rufis ; prothorace ad latera area 

 parva strigulosa ; elytris striis sex sat profundis et fere integris, aliaque marginali 

 brevissima. Long. 5§, lat. 3 m.m. 



The only individual I have seen is a typical specimen from Dejean's collection, it 

 is a female. The species appears to be closely allied to Copelatus fuscipennis, but 

 is more elongate in form, and darker in colour, and instead of having a few distant 

 scratches on the thorax, has at the sides a small patch of crowded scratches. 



Amboyna. 707. 



857. Copelatus gentilis,n.sp. — Fe7n., Ovalis, baud angustus, subdepressus, nitidus, 

 subtilissime punctulatus, nigricans, antennis, pedibus, capite, prothoracis lateribus 

 eh'trorumque basi rufis, his apice testaceis ; prothorace lateribus ante angulos 

 posteriores area parva strigulosa; elytris striis sex, integris, minus subtilibus, 

 aliaque marginali abbreviata. Long. 5|, lat. 3 m.m. 



I have seen but a single female. Though closely allied to Copelatus fuscipennis, 

 this is undoubtedly a distinct species, being larger and darker, and having the 

 prostemal process considerably larger. 



Batchiau, (Wallace). 694. 



858. Copelatus geniculatus, n. sp. — Mas, Ovalis, vix latus, subdepressus, nitidus, 

 piceus, supra nigricans, capite anterius prothoraceque ad angulos anteriores 

 fufescentibus, elytris ante apicem sat discrete rufo-maculatis, antennis pedibusque 

 rufis ; subloevigatus, prothorace ante angulos posteriores strigulis paucissimis ; elytris 

 striis sex integris, inter se fere sequaliter distantibus, aliaque marginali abbreviata. 

 Long. 6, lat. os m.m. 



In the male the front and middle tarsi are much dilated, and the front tibite ai'e 

 comparatively slender and are greatly curved at the base, and not very distinctly 

 bisinuate inwardl3^ 



Malay Archipelago. 706. 



4 F 2 



