On Aquatic Curnivorous Coleoptera or Dytiscide. 581 
abbreviated there; at the base there may be seen between the strise some short 
marks or scratches representing rudimentary intermediate strie. In this species 
the lateral part of the wing-case is darker than the other parts. I have seen only 
the female. 
Celebes. 693. 
856. Colymbetes lineatus, Guer., M.C.—/’em., Ovalis, sat angustus et elongatus, 
piceus, supra nigricans, capite prothoracisque lateribus dilutioribus, elytris ad 
apicem testaceo-maculatis, antennis pedibusque rufis; prothorace ad latera area 
parva strigulosa; elytris striis sex sat profundis et fere integris, aliaque marginal 
brevissima. Long. 53, lat. 3 m.m. 
The oniy individual I have seen is a typical specimen from Dejean’s collection, it 
isa 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.—Fem., Ovalis, haud angustus, subdepressus, nitidus, 
subtilissime punctulatus, nigricans, antennis, pedibus, capite, prothoracis lateribus 
elytrorumque 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 
prosternal process considerably larger. 
Batchian, (Wallace). 694. 
858. Copelatus geniculatus, n. sp.— Was, Ovalis, vix latus, subdepressus, nitidus, 
piceus, supra nigricans, capite anterius prothoraceque ad angulos anteriores 
rufescentibus, elytris ante apicem sat discrete rufo-maculatis, antennis pedibusque 
rufis ; subleevigatus, prothorace ante angulos posteriores strigulis paucissimis ; elytris 
strils sex integris, inter se fere eequaliter distantibus, alaque marginali abbreviata. 
Long. 6, lat. 3§ m.m. 
In the maie the front and middle tarsi are much dilated, and the front tibiee are 
comparatively slender and are greatly curved at the base, and not very distinctly 
bisinuate inwardly. 
Malay Archipelago. 706. 
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