586 On Aquatic Carnivorous Coleoptera or Dyliscidce. 



feminse ad latera crebrius latiusque striguloso ; elytris striis duabus suturalibus 

 anterius longe desinentibus, octo subtilibus ad apice fere prolongatis (alternis 

 brevioribus), aliaque marginali anterius valde abbreviata. Long. 7i, lat. 3| m.m. 



The male has the front and middle tarsi broadly dilated, and the front tibiae 

 simple, and the thorax almost without sculpture (except the marginal series) : the 

 female has the sides of the thorax covered over a rather broad space with fine but 

 quite distinct scratches or strife. The species has the second .stria from the suture 

 indicated only by some small interrupted remnants, the first stria is less obliterated. 

 I have seen only a single pair. 



Panama. G44. 



870. Copelatus nigricans, n. sp. — Eobustus,. ovalis, latus, nitidior, niger, capite 

 piceo, prothorace lateribus anguste ferrugineis, elytris apice sordide testaceo, 

 antenuis pedibusque rufis, corpore subtus piceo; prothorace feminre ad latera 

 striguloso; elytris striis duabus suturalibus anterius longe desinentibus, octo ad 

 apice fere prolongatis (alternis brevioribus), aliaque marginali anterius valde 

 abbreviata. Long. 71, lat. 4 m.m. 



1 have seen but one individual, which is a female; besides the scratches on the 

 thorax there are numerous very distinct scratches on the sides of the elytra, not 

 extending to the base or apex. The species is closely allied to Copelatus prolongatus 

 but is much broader. 



Soiith America, (New Granada, coll. de Bonvouloir). C4.5. 



87L Copelatus vigintistriatus, Fairm., Ann. Soc. Ent. Fr. 1869, p. 188. — Oblongo- 

 ovalis, angustulus, sat depressus, piceus, capite thorace elytrorumque lateribus 

 dilutioribus, antennis pedibusque rufis ; prothorace subloevigato, strigulis brevissimis 

 per-paucis ; elytris striis decem sat profundis, suturali anterius, alternis posterius, 

 brevioribus, aliaque marginali brevissima. Long. .51, lat. 2* m.m. 



I have seen only the female of this species. 



JNIadagascar. 702. 



872. Copelatus polystrigus, n. sp. — Ovalis, sat angustus, subdepressus, nitidus, 

 nif'ropiceus, elytris vitta intra -laterali cum macula ante-apicali fere conjuncta 

 testacea, prothoracis lateribus dilutioribus, antennis pedibusque rufis ; prothorace 

 sublaevigato, strigulis brevissimis per-paucis ; elytris striis decem profundis, alternis 

 posterius brevioribus, aliaque marginali valde abbreviata. Long. 6, lat. 3 m.m. 



I have seen only females of this species. The individuals from Senegal have a 

 fascia of a red colour at the base of the elytra which is scarcely to be seen in 



