226 NORTHERN ZOOLOGY. 



DESCRIPTION. 



Body above copper-coloured, glossy ; underneath covered with a thick coat of decumbent pile of 

 a cinerous colour, glittering in certain lights. Head downy, channelled ; mouth and palpi rufous ; 

 mandibles and antenna3 black : prothorax rather wider than long, very minutely, thickly and conflu- 

 ently punctured and wrinkled; channelled, with a pair of impressions on each side, anterior tubercles 

 not prominent : scutellum downy : elytra very grossly punctured in rows ; a single anterior impres- 

 sion near the suture; truncated at the apex: three intermediate ventral segments of the abdomen 

 have a yellow margin : legs obscurely rufous ; thighs bronzed in the middle ; posterior thighs with 

 a minute tooth near the apex. 



(306) 7. * Donacia hirticollis. Hairy-necked Donatio. 



D. (hirticollis J pubescens, subtus holosericeo-argentea ; elytris glabris, atris ; striarum punctis viridi-inauratis ; femoribus pos- 



ticis unidentatis. 

 Hairy-necked Donacia, downy, satiny, underneath and silvery; elytra naked, black, with the punctures of the rows green 



gilt ; posterior thighs unidentate. 



Length of the body 3£ lines. 



A single specimen taken in Lat. 65°. 



DESCRIPTION. 



Body underneath covered with a thick coat of decumbent pile resembling satin and shining like 

 silver. Head hoary from inconspicuous hairs, most minutely and confluently punctured with a slight 

 interocular channel with an obtuse ridge on each side ; antennas with the second and third joints 

 equal in length ; labrum glittering with silver pile : prothorax longer than wide, hoary from incon- 

 spicuous down, most minutely and confluently punctured, channelled, sides subimpressed, anterior 

 tubercles flat : scutellum large, levigated : elytra black, punctured in rows, whose interstices are 

 wrinkled ; posterior thighs with a single short obtusangular tooth. 



This pretty species comes near D. bidens Oliv. which I always find on Potamogeton natans, but 

 it is sufficiently distinguished by its black thorax hoary from down, and legs without any red. 



(307) 8. Donacia mavALis. Equal Donatio. 



Donacia aequalis. Say. Journ. Nat. Sc. Philad. vi, 428 ? 

 Length of the body 4— 4£ lines. 



Many taken in the Journey from New York to Cumberland-house. 



