ANATID.il. 17 



ff. Serrations on the cutting edge of upper mandible not I'lsi- 

 h/e from the outside, except at the base; tomium almost straight; bill moderate but strong. 



g. JVeb of feet not deeply excised, i. e., cut away 



from back along both sides of the middle toe (Page 19.) Branta. 



gg. Web of the feet deeplj' excised. 



(Page 19.) Nes'ochen. 



Genus MiERGANSlBR Brissox. 

 Distance between nostrils and nearest feathers on the sides of upper mandible 

 decidedly less than the depth of the upper mandible at base ; feathering on sides of 

 base of upper mandible projedling far forward, forming a very decided though obtuse 

 angle. Adu/t male: Head dull greenish black, the occiput with a long pointed crest; 

 neck and sides of chest dull brownish buff or light cinnamon streaked with black ; other 

 lower parts mainly white, usually tinged with cream color (Ridgway). Female: Head 

 and neck reddish brown, darkest on the crown; back scapulars and small wing coverts 

 umber brown ; edge of the feathers paler ; a white patch on the wing ; under parts white. 

 Length 20.00-25.00, wing 8.60-9.00, culmen about 2.50, tarsus i. 80-1.90, middle toe 2.40. 

 Hab. Northern portion of northern hemisphere, breeds northward. Hawaii," Oahu. 



36. M. serra'tor (IvInn). Red-breasted Merganser. 



GExrs A'NAS Linn^us. 



Culmen shorter than the middle toe; central tail feathers but slighth- curled, 

 some specimens not at all. 



a. No ichite ring aroiind the eyef^ speculum greenish blue; .under tail coverts 

 in fully iledged niale(?) more or less blackish, edged and mixed with chestnut; riimp 

 blackish, with varying amount of chestnut; abdomen with pale greyish chestnut 

 ground streaked and spotted with blackish ; neck and breast of the same chestnut as 

 the under tail coverts, with oval blackish centres to the feathers of the chest, which 

 become mere streaks on the neck, most numerous on the chin (one specimen with less 

 black on the chin); lesser wing coverts dark grey, with some paler edges; under wing 

 coverts white ; feet orange ; speculum edged with a band of black followed by a white 

 one (variable in width in front), behind by a black baud followed by a white one 

 equal to or wider than the black. Female similar. Length i about 18.50 (Scale), 

 wing 9.10-9.50, tail 3.50, culmen 1.80, tarsus 1.35, middle toe 2.10, depth of bill 

 .68-. 70; ? wing 8.50, tail 3.60, bill 1.80, tarsus 1.38, toe 2.00. Hab. Hawaiian Islands. 

 PI. XXII., 9168, 9424. 27. A. wyvillia'na Scl. Hawaiian Duck, Koloa maoli. 



aa. Ring of ivhite feathers about the eye; centre pair of tail feathers but little 

 curled at the tips. Male: General color of plumage rufescent ; head and nape with a 



>2 Mr. Henshaw reports the takings of two specinien.s near Hilo, November 1899. Sec Auk, \'ol. .Will., p. 20,;. I am also informed that 

 It has been taken on Oahu. 



13 Dr. Schauinsland's list adds A. bosais. I.inn., from Ivay.san. It is distinguished from other Itawaiian ducks b\- having' no white riny; 

 about the eye, and with the speculum greenish blue. T^ength 24.00. It is hardly possible hat tlie Doctor has confused this with the much 

 smaller form which is indigenous to I.aysan. 



Mfmoirs B. p. H. Museum, Vol. I.. No. 3.-2. L^ySj 



