12 Aves. 
XV 
Aves. 
[1921] 
273. — Hankin, E. H. The problem 
■of soaring flight. Proc. Cambridge 
Phil. Soc. 20 1921 pp. 219-227. 
274. — Hanna, G. D. The Pribilof 
Sandpiper [ Arquatella ptilocnemis ]. 
Condor Berkeley Cal. 23 1921 pp. 
50-57 1 fig. 
Hanna, G. D. vide Mailliard. 
275. — Hansen, M. E. Fugleholmen 
Madstedborg. Flora og Fauna Kjoben- 
liavn 1921 pp. 23-26. 
276. — Hanson, B. Trekkfugler 
overvintrende ved Kristiansund, 1920- 
21. Norsk Orn. Tids. Stavanger 
No. 1 1921 pp. 55-56. 
Harper, F. vide Murphy. 
277. — Harris, J. A. and Lewis, H. R. 
The second year record of birds 
(domestic fowls) which did not lay 
during individual months of the pullet 
year. Science New York 54 1921 
pp. 224-226. 
278. — Harris, J. A. and others. The 
egg records of limited periods as criteria 
for predicting the egg production of 
the White Leghorn fowl. Genetics 
Baltimore 6 1921 pp. 264-309. 
279. — Hartert, E. Die Vogel der 
palaarktischen Fauna. Heft xiii- 
xiv, pp. i-xxix + 1601-1764 9 figs. 
Heft xv pp. 1765-1822 10 figs. Heft 
xvi pp. 1893-2020 2 figs. Heft xvii 
pp. 2021-2148. Berlin (Friedlander) 
1921 8vo. 
280. — Hartert, E. Anthreptes 
yokanae and Phyllastrephus rabai 
spp. n. Bui. Bt. Orn. Cl. London 41 
1921 pp. 63-64. 
281. — Hartert, E. A new Eupri - 
noides dsecribed. Bui. Bt. Orn. Cl. 
London 41 1921 p. 120. 
282. — Hartert, E. A new Pycno - 
notus. Bui. Bt. Orn. Cl. London 41 
1921 p. 126. 
283. — Hartert, E. An albinistic 
Halcyon chloris. Bui. Bt. Orn. Cl. 
London 42 1921 pp. 7-8. 
284. — Hartert, E. Report of a sub- 
committee, consisting of Dr. E. H., 
Messrs. T. Iredale and W. L. Sclater, 
on amendments and proposed altera- 
tions to the names in the B.O.U. 
List of British Birds, as accepted by 
the Committee of the B.O.U. on the 
British Bird List. Ibis London 1921 
pp. 310-316. 
285. — Hartert, E. Captain Angus 
Buchanan’s Air Expedition. IV. The 
Birds collected by Capt. Angus Bu- 
chanan during his journey from Kano 
to Air or Asben. Nov. Zool. Tring 
28 1921 pp. 78-141 pis. i-ix. 
Hartley, I. vide Beebe. 
Haviland, M. D. vide Meinertzhagen. 
286. — Havre, G. van. Observations 
ornithologiques faitos du ler mai 
1920 au 30 avril 1921. Gerfaut 
Bruxelles 11 1921 pp. 38-57. 
287. — Havre, G. van. Faune de 
Beige — a propos des Aigles criards — 
Aquila clanga Pallas et Aquila pomarina 
Brehm. Gerfaut Bruxelles 11 1921 
pp. 73-80 photo. 
288. — Hellmayr, C. E. Twelve new 
Neotropical birds [ Henicorhina , Thryo- 
philus , Pheugopedius , Myadestes, Tan- 
gar a, Chlorospingus, Mecocer cuius, 
Xenops, Thalurania]. Anz Orn. 
Ges. Bay. No. 4 1921 pp. 25-32. 
289. — Hellmayr, C. E. Zwei neue 
neotropische Vogelformen. [ Thryo - 
philus, Nonnula ]. Anz. Orn. Ges. 
Bay. Miinchen No. 5 1921 pp. 41-42. 
290. — Hellmayr, C. E. Remarques 
sur les espaces neotropicales du genre 
Anthus. Hornero Buenos Aires 2 
1921 pp. 180-193. 
291. — Hellmayr, C. E. Review of the 
birds collected by Alcide d’Orbigny 
in South America, Parts i, ii. Nov. 
Zool. Tring 28 1921 pp. 171-213 230- 
276. 
292. — Helms, O. H. Chr. C. Morten- 
sen, 27 Aug. 1856-7 Juin 1921. 
Dansk. Orn. Tids. Kjpbenhavn 15 
1921 pp. 93-97 portr. 
293. — Hennemann, W. Zum Vor- 
kommen der Nachtigall im Sauerlande. 
Jahresber Prov. Ver. Wiss. Munster 
44 1916 pp. 169-173. 
294. — Hennemann, W. Zum Ein- 
treffen des Fitislaubvogels im Sauer- 
lande 1921. Orn. Monatsb. 29 1921 
pp. 85-86. 
