44 Aves. 
XV. Aves. 
[1921] 
Branta leucopsis, B. b. bernicla nests 
and eggs from Spitsbergen described, 
Jourdain 343. 
Tadorna tadorna in Massachusetts 
first N. Amer. record, Morse 494. 
Anas boscas feather development, 
Ewart 204. — A. undulata rueppellii 
a distinct race, Sclater 660. 
Nettion crecca X Dafila acuta hybrid, 
Blaauw 82. 
Dafila acuta breeding status in Scot- 
land, Baxter & Rintoul 60. 
[ Querquedula ] Anas querquedula in S. 
Sahara in August, Hartert 285 p. 93. 
— Q. cyanoptera eclipse plumage, 
Stephens 694. 
Netta rufina breeding in Lake Con- 
stance (Bodensee), Lauterborn 389. 
[ Ayihya ] Nyroca rufa Linn. 1761 
antedates N. nyroca Gueldenst, 1769, 
Mathews & Iredale 459 p. 153. 
Fulix Sundevall must replace Marila 
Oken p. 106, Perissonetta gen. n. for 
type Anas collaris Donovan p. 110 and 
revision of arrangement of allied species, 
Oberholser Proc. Indiana Acad. Sci. 
for 1920. 
Tachyeres cinereus further discussion 
of supposed two species or races, Wage 
757 p. 201. 
Oidemia perspicillata in the Baltic, 
Lonnberg 415. 
Somateria molissima in Hungary, 
Schenk 636. 
[Erionetta] Somateria spectabilis taken 
in Pennsylvania, Stone 698. 
Thalassornis leuconotus insularis 
barely recognisable as distinct, Sclater 
660. 
Erismatura leucocephala in Thuringia, 
Schalow 634. 
ORDER PELICANIEORMES. 
Phalacrocorax graculus in a peat-bog 
near Salzburg, Tratz 744. — P. africanus 
menegauxi subsp. n. Togoland, Millet- 
Horsin Rev. Fr. d’Orn. 13 p. 177. 
Sula bassana variations, Balfour 
42. — Sulita senator rex subsp. n. New 
Zealand, Mathews & Iredale Man. 
Bds. Austr. 1 p. 77. 
ORDER CATHARTIDIFORMES. 
Sarcorhampus gryphus photographed 
in flight, Murphy 503 pp. 90-97. 
Cat'artes aura meridionalis South 
America, C. a. insularis Cozumel I. 
subspp. n., Swann Synopsis p. 3. 
ORDER ACCIPITRIFORMES. 
A Synopsis of the Accipitres, Swann 
711. 
Nestling down of Hawks, Ingram 329. 
Birds of Prey of Czecko-Slovakia, 
Ponebsek 565. 
Birds of Prey of Ceylon, Wait 760. 
The Birds of Prey of the Punjab, 
Donald 190. 
On the Accipitres of Venezuela, 
Swann 712. 
Falconry in India, Donald 191. 
Qyps fulvus, recorded in Finland, 
Lonnberg & Palmgren 429 ; Palm- 
gren 546 ; in the Tarn goiges, S. 
France, Roohon-Duvigneaud 606.- 
O. tenuirostris nesting in the United 
Provinces, India, Gill 236. 
Neophron percnopterus in the Tarn 
Gorges in S. France, Roohon-Duvig- 
neaud 606. 
Necrosyrtes m. monachus photo nr. 
Kano and soft parts coloration, 
Hartert 285 p. 94 ; unusual plumage 
stage, Lowe 428 p. 277. 
Ibycter americanus guatemalensis 
subsp. n. Guatemala, Swann Synopsis 
p. 14. — I. gynmocephalus no specimen 
ever obtained, Hellmayr 291 p. 174. 
[Polyboroide3] Oymnogenys typicus 
kempi Sierra Leone, O. t. graueri Lake 
district of C. Africa, subspp. n, Swann 
Synopsis p. 17. 
Circus pygargus abnormal nesting, 
Guerin 266. — C. aeruginosus in Su- 
matra, Beaufort 62 p. 173. 
Micrastur gilvicollis taxonomy and 
synonymy, Hellmayr 291 p. 178. 
Oeranospiza caerulescens livens subsp* 
n. Mexico, Bangs & Penard Proc. 
Biol. Soc. 34 p. 89. 
Urotriorchis macrourus batesi subsp. n. 
Cameroon, Swann Synopsis p. 29. 
