On Aquatic Carnivorous Coleoptera or Dytiscide. 57.1 
829. Copelatus restrictus, n. sp.—Oblongus, elongatus, angustus, depressus, 
parallelus, fusco-rufus, capite, prothoracis lateribus, elytrorum basi, antennis 
pedibusque rufis, prothorace eryensdue crebre subtiliter strigulosis, his striis 3 vel 
5 obsoletis. Long. 5 m.m. lat. 2 m.m. 
In the male the front and middle tarsi are a good deal dilated, the front Ae 
are rather stout and simple. I have seen but a single individual. 
Monte Video, (Sivori, Genoa Mus.) 657. 
830. Copelatus sexstriatus, n. sp.—Oblongus, sat angustus, subtus nigricans, 
supra magis fusco-castaneus, crebre punctulatus, capite, prothorace ad angulos 
anteriores elytrisque ad basin ad apicem et ad latera rufescentibus, his striis 
tribus, intermedia ad apicem desinente, prima et tertia a sutura et a margine 
laterali zequaliter remotis. Long. 6, lat. 3 m.m. 
In the male the front and middle tarsi are greatly dilated, the front tibiee are 
much, though gently, curved on their outside, and broadly emarginate a little dis- 
tance below the knee. I do not know the female of this very distinct species. 
South America, (Columbia). 656. 
831. Copelatus punctulatus, n. sp.—Oblongus, angustulus, subparallelus, piceus, 
capite prothoracis lateribus, elytrorum basi antennis pedibusque rufis ; prothorace 
obsolete punctulato; elytris parce punctulatis, striis quatuor elongatis, prima a 
sutura remota. Long 5, lat. 2? m.m. 
In this species the four strize on the elytra are elongate, the second and fourth 
being a little shorter; the first is twice as distant from the suture as itis from the 
second, while the outer one is almost equidistant from the third and from the lateral 
margin. The specimens before me are four in number and vary in length, and 
somewhat in depth of colour and in the distinctness of the fine punctuation of the 
upper surface. In the male the front and middle tarsi are a good deal dilated, and 
the front tibize a good deal bent below the knee and with a notch on their inner 
edge. 
Brazil, (Santa Rita, Aug., 1850, R. F. Sahlberg). 653. 
832. Copelatus prolixus, n. sp.—Oblongus, perelongatus, angustulus, subparallelus, 
piceus, capite, prothoracis lateribus elytrorumque apice rufescentibus, antennis, 
pedibus elytrorumque basi rufis ; prothorace fere leevigato ; elytris parce punctulatis, 
striis quatuor fere zequalibus ; coxis posterioribus minus fortiter aciculatis ; antennis 
valde elongatis. Long. 7, lat. 83 m.m. 
This is a species of remarkably elongate form ; the four strize of the elytra are 
nearly of equal length and terminate a little before the extremity, the first of them 
TRANS, ROY. DUB. SOC., N.S, VOL. I. 4 
