THE CANADIAN ENTOMOLOGIST. 129 
INSECTS OF THE NORTHERN PARTS OF BRITISH AMERICA. 
COMPILED BY THE EDITOR. 
From Kirby's Fauna Boreah-Americana: Insecta. 
(Continued from Page 117.) 
305. Donacia CUPRÆA KA7irby.—Length of body 4% lines. Taken 
in Canada by Dr. Bigsby [also on Lake Superior. }. 
[226.] Body above copper-coloured, glossy ; underneath covered 
with a thick coat of decumbent pile of a cinereous colour, glittering in 
certain lights. Head downy, channelled ; mouth and palpi rufous ; man- 
dibles and antennae black; prothorax rather wider than long, very 
minutely, thickly and confluently 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 
impression 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. DonacIA HIRTICOLLIS A%7by.—Length of body 3% lines. A 
single specimen taken in Lat. 65°. 
Ste Sp 5 
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 ; antennae with the second and 
third joints equal in length ; labrum glittering with silver pile ; prothorax 
longer than wide, hoary from inconspicuous 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 2. didens 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. 
[Synonymous with D. rudicollis Lac. Taken on Lake Superior. ] 
