102 
AMERICAN SCOTER. 
Male duck, similar to the following, but with the tubercle at the 
. base of the bill entirely orange. 
IN. IN. 
TieNG EN: ueeras cesteiv sacs 19 ~ AW hdl: 800 sacs oe vee 3 
1 277 (MRSA es eM PT 13 ONGEr GOES eis oucenteak 23 
DAES aaaav iene ceneseecgher 23 TANECT LOE see ieneteeds 23 
Male distinguished from the following, which it in every other 
respect resembles, by the protuberance at the base of the bill and a 
small space anteriorly and laterally being entirely orange, and by the 
sides of the nail at the apex of the upper mandible being suddenly 
narrowed. 
Fem.: a similar distinction holds between the females of this and 
the following as regards the nail. 
Oidemia AMEVICANA ...ceccceccecer Faun. Bo. Am. 2. 450. 
Nutt. Orn. 2. 442. 
Brought home by’ Dr. Richardson from the neighbourhood of 
Hudson’s Bay. Specimens are in our collection. 
MELANITTA NIGRA. 
Mel. Mas.—Ater; tubercula bifida atra ad basin rostri. 
Mel. Fem.—Brunnea; subtus cinerea, macula albicante gutture. 
BLACK SCOTER. 
Male scoter, with a bifid black tubercle at the base of the bill. 
Fem. brown; beneath cinereous, with a white patch on the throat. 
IN. IN. 
PIOUGUN ops cas voce axa vann 21 DATEL Ws base sagupebtas 1 9-12ths 
Bill eecerece Ceoreseccecasee 1i Middle toe eeecseoes 23 
Male entirely black, glossy on the head and neck; no speculum; 
a bifid protuberance at the base of the bill, orange in the centre, © 
black on the sides; a small patch anterior to the tubercle also orange ; 
remainder black; legs dark lead-coloured. : 
Fem.: sooty black or brown; a large light-coloured grey patch 
on the throat, extending backwards to the hind neck, and below about 
half-way down the fore neck; bill (devoid or nearly so of a tubercle) 
entirely black ; legs as in the male. 
Young similar to the female. 
