80 NORTHERN ZOOLOGY. 



(115) 2. Gyrinus iENEUS. (Leach.) Bronzed Gyrinus. 



Gyrinus sneus. Sam. Norn, i, 20. Curt. Brit. Ent ii, 79, Steph. Illustr. Mandib. ii, 95, 1. 



Length of the body 2- lines. 



Taken in Canada by Dr. Bigsby. 



DESCRIPTION. 



Very like the preceding species, but much smaller, the transverse impression of the nose and the 

 frontal impressions are not so deep ; that of the prothorax is not so conspicuous, and there are no 

 lateral bosses; the elytra are much narrower at the apex, where, as in G. marimts, a crescent is 

 marked out by punctures. 



(116) 3. * Gyrinus ventralis. Ventral Gyrinus. 



G. (ventralis) nitidus, subtusferrvgineus, supra caruko-niger ; elytris maryine omni, at striarum punctalis, aneo-nilentibus. 

 Ventral Gyrinus, glossy, underneath ferruginous, above blue-black ; both margins of the elytra, and the punctures in the 

 rows, brilliantly bronzed. 



Length of the body 2f lines. 



Two specimens taken in Lat. 54°. 



DESCRIPTION. 



Nearly related to G. ceneus, but the whole prone surface of the body, the epipleura of the elytra, 

 and the legs, are ferruginous; in which particulars it resembles G. lineatus ; it is however much 

 smaller than that species, the punctures in the rows are more conspicuous, and the elytra have no 

 bronzed stripes. 



