of Dytiscidce Darwiniance. 1 1 



laterali oblonga fenestiata, subtus niger, antennis pedibusque 



fuscis. (L. c. 3; lat. 1| lin.) 

 A third part smaller than the preceding, ovate, black, very 

 minutely reLiculate-strigose. Head immaculate. Antennae fus- 

 cous. Thorax much broader behind than in front, the hinder 

 angles slightly acute. Scutelluni black. Elytra oval, obscurely 

 ribbed longitudinally, and having at a little beyond the middle, 

 and near to the outer margin, a minute oblong fenestrated spot ; 

 the usual striae scarcely distinguishable, and very irregular. Body 

 beneath black. Legs fuscous. 

 Hab. Tierra del Fuego. 



COLYMBETES (CoPELATUS.) 



CoPELATUs, Erichs. Dytis. 38. 

 13. (14.) C. elegans, Bab. 

 Ovato-oblongus, rufo-fuscus, impunctatus, thorace longitudi- 

 naliter strigoso, elytris striis 10 ornatis, alternis abbreviatis, 

 apicem acutum non atlingentibus, corpore subtus antennis 

 pedibusque rufo-fuscis. (L. c. 3; lat. Ig lin.) 

 Ovate-oblong, fuscous red, not punctured. Head short, trans- 

 verse, with two minute foveae between the eyes. Thorax short, 

 transverse, broadly emarginate in front; the angles acute and 

 prominent; margins slightly rounded, broader behind; the margin 

 nearly straight; the angles rectangular; the disk darker than the 

 sides and head, covered with minute longitudinal striae, a row of 

 which occupy the place of the usual series of punctures near to 

 the anterior margin. Scutellum minute. Elytra oblong, acute, 

 rufo-fuscous, the base paler, each with ten strong longitudinal 

 striae, which do not extend to the apex, the second about half as 

 long, and the other alternate ones not exceeding three-fourths of 

 the length of the elytra. Body beneath and legs fuscous red. 

 Hab. Rio de Janeiro. 



Hydaticus, Leach. 

 1. (15.) H. Havaniensis, Laporte. 

 Obovatus, testaceus, thorace antice posticeque nigro, elytris 

 nigro-irroratis macule dorsalid transversa nigrd lateribus 

 testaceis, subtus niger, antennis pedibusque 4 anticis testaceis, 

 femoribus posticis testaceis macula internd basali nigra; tibiis 

 nigro-fuscis, tarsis fuscis. (L. c. 5-5\ ; lat. 2|-3^ lin.) 



H. Havaniensis, Laporte, Etud, Ent. 96. 



