On Aquatic Carnivorous Coleoptera or Dytiscide. 277 
obseuro, elytris guttis duabus basalibus, aliaque post-medium testaceis ; pedibus 
rufis, posterioribus obscuris, antennis testaceis. Long. 33, lat. 13 m.m. 
East India, (Bombay fide Aubé). 612. 
61. Canthydrus angularis, n. sp.—Ovalis, convexus, posterius attenuatus, perni- 
tidus, niger, capite anterius, prothorace ad angulos anteriores, maculis duabus ad 
elytrorum basin alteraque pone medium rufis; antennis testaceis, pedibus quatuor 
anterioribus rufis, posterioribus piceis. Long. 32, lat. 13 m.m. 
Singapore. 485. 
62. Hydroporus leetabilis, Walk. M. C.—Ovalis, minus latus, posterius attenuatus, 
sat convexus, pernitidus niger, capite, thorace pedibusque rufo testaceis, antennis 
testaceis ; thorace anterius et in basi obscure nigro ; elytris maculis duabus pone 
basin aliaque transversim elongata pone medium testaceis. Long. vix 2, lat. 
13. m.m. 
East India, (Ceylon fide Walker). 484. 
63. Hydrocanthus weisei, Wehncke, Berl. Zeit. 1876, p. 222.—Ovalis, posterius 
attenuatus, sat convexus, pernitidus, testaceus, prothorace versus basin infuscato, 
elytris nigricantibus, fascia interrupta pone medium, vitta longitudinali ab humero 
ad fasciam postmedialem descendente, maculaque magna basali testaceis ; pectore 
fusco, abdomine nigro. Long. 2} m.m., lat. vix 12 m.m. 
Closely allied to Hydrocanthus politus (No. 69) and much resembles the dark 
varieties of that species, but it is smaller and narrower, and has the apex of the 
elytra dark. 
Cochin China, (Wehncke). 611. 
64. Hydrocanthus quadrivittatus, Boh. M. C.—Ovalis, convexus, breviusculus, 
posterius acuminatus, nitidus, levis, rufo-testaceus, elytris obscurioribus, vitta 
laterali obliqua aliaque abbreviata prope suturam testaceis ; abdominis lateribus 
leviter infuscatis. Long. 3, lat. 13 m.m. 
The stripes on the elytra readily distinguish this species ; they are not sharply 
defined ; the exterior one starts from the humeral angle, and then leaves the outer 
margin and extends along the middle of the wing-case reaching the apex ; the 
inner mark is shorter and runs parallel with the suture, but does not extend much 
beyond the middle. 
Cape Good Hope, (Caffraria fide Boheman). 610. 
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