BIRDS—FULIGULINAE—BUCEPHALA. 
795 
Female with the black and chestnut replaced by brown, the cheeks and chin lighter, and some tinged with dull rufous. 
Length, 20.10; wing, 9.30 ; tarsus, 1.70 ; commissure, 2.65. 
Hab.—Whole of North America. 
List of specimens. 
Catal.| Sex Locality. When col- 
No. lected. 
606 | & | Potomac river, D. C....| Feb, —,1842 
(2) hoc doe: CARs eanopdtoon bscopaccupeo de 
5137 | @ | Delaware creek, N. M..| Mar, 26,1856 
i eee Sam Francisco oo. vcene|sccvoevecceces 
D780) | Fee crsie Bodega, California..... Jan. —,1855 
BAT AG. ciacle's Fort Dalles ...00+sscceslecee CC RRRSAH 
STI |eaeeus Fort Steilacoom ......- Jan. —, 1854 
Whence obtained. Orig’! 
Remarks. 
BUCEPHALA, Baird. 
Collected by— | Length.| Stretch | Wing. 
| No. of wings. 
S. F. Baird ..0000|..000- BBE cose ccersccnceleoveccce| cose cces [even sece 
Ceaeee GOie pe. sicncle|eeetae = Eh caiesectaclemens lescets eee llecustccalescelecels 
| Capt. Pope ...... 189 |... .cccccccceescene 23.25 | 31.50 | 10.00 
Lit. Williamson ..)cccce [ooccsccccccncccccelesessoer| ceveccee [eccevcce 
Lt. Trowbridge ..|...... T. A. Szab0.....|.ccccsee| cscceee|ececcees 
Dr. Suckley ..... 5S, |'asajarei nals ciate olate aictote | alae wists! | pn'eleieiaictes|| « alaalan'e 
Gov. Stevens....|...00+ Dre SUCKLE Vireramms)| ale sieves) | etmsia pein are) [erase es 
Bill black, iris red, feet 
dark gray. 
Clangula, Fremine, Philos. Zool. 1828. Type Anas clangula, L. Not of 1822, which has .2nas glacialis for type, 
according to G. R. Gray. 
Glaucion, Kaur, Ent. Europ. Thierw. 1829. Not of Oken, 1816, Mollusca. 
Bucephala, Barro. 
Type Anas albeola, L. 
Cu.—Bill from feathers of forehead about equal to the tarsus and shorter than the head; high at the base; lateral outlines 
tapering to the tip, where the nail forms only the central portion, though rather large. 
the bill. Feathers of chin and forehead extending only moderately foreward a little further than those of cheeks. 
rather more than half the foot. 
Nostrils situated near the middle of 
Tarsus 
Tail moderately long, about half the wing, and somewhat pointed; of sixteen feathers. 
The B. americana differs decidedly from the B. albeola in a stouter bill, with the nostrils in 
the posterior portion of the anterior half, instead of in the anterior portion of the posterior part. 
As the genus Clangula of 1822 has Anas glacialis for type, according to Gray, it cannot be 
used for the present group. 
required. 
The following diagnoses will distinguish the species : 
Giaucion of Kaup being pre-occupied, a new name appears to be 
-Common characters.—Head and upper part of neck dark colored, with varied reflections, 
usually of green, purple, or violet. 
Lower part of neck all round, under parts and sides, 
scapulars, middle and greater coverts, and many secondaries, white; the scapulars edged 
externally with black ; upper parts generally black. Inside of wings and axillars sooty. 
. An oval patch of white in front of the eye and along the side of the bill, but not 
reaching its upper corner, 
Inside of wings and axillars entirely dusky...... ates 366 
White of wings continuous. 
Head with green reflections. 
.B. americana, 
A triangular patch in front of the eye, applied against the entire base of the bill, and 
running up in a sharp point, 
glossed with violet reflections. 
White of wing coverts crossed by a black bar. 
Head 
Inside of wings and axillars pure sooty... B. islandica, 
A broad white patch on each side the head, behind the eye, and confluent with its fellow 
on the nape. 
White of wings continuous. 
Head glossed anteriorly and behind with 
green ; between this, with purple violet. Under wing coverts and axillars tipped with 
1 INL has Aco geo R Rams eerm rice credo 
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