29 Aves. 
Titles. 
5800 
Qberholser, H. C. The Common 
Ravens of North America. Ohio J. 
Sci. Columbus 18 1918 (213-225). 620 
Oberholser, H. C. The criterion of 
subspecifie intergradation in verte- 
brate zoology. Science New York 
48 1918 (165-167). 621 
Oberholser, H. C. The scientific 
name of the Passenger Pigeon. Science 
New York 48 1918 (445). 622 
Oberholser, H. C. Mutanda ornitho- 
logica iii, iv. Washington Proc. Biol. 
Soc. 31 1918 (47-60 125-126). 623 
Oberholser, H. C. Olor columbiavms 
in the Potomac river. Squatarola 
squatarola cynosurae near Washing- 
ton, D.C. Hierofalco rusticolus can- 
dicans in North Dakota. Aristonetta, 
a good genus. Spizella monticola 
(Gmelin), the correct name for the 
North American Tree Sparrow. Wash- 
ington Proc. Biol. Soc. 31 1918 (97- 
98). 624 
Oberholser, H. C. Description of 
a new Iole from the Anamba Islands 
Washington Proc. Biol. Soc. 31 1918 
(197-198). 625 
Oberholser, H. C. The status of the 
genus Orchilus Cabanis. Washington 
Proc. Biol. Soc. 31 1918 (204-205). 
626 
Oberholser, H. C. The Great Plains 
waterfowl breeding grounds and their 
protection. Washington D.C. Year- 
book! Dept. Agr. for 1917 1918 No. 723 
(1-10). 627 
Oberholser, H. C. vide Gudger. 
Oberholser, H. C. and Chapman, 
P. M. The migration and plumage of 
North American birds. Bird-Lore 
Harrisburg Pa. 20 1918 (16-20 145- 
153 219-223 286-290 345-350 416) 
many plates. 628 
Oort, E. D. van. Ornithologia 
Neerlandica. De Vogels van Neder- 
land. Pts 1-4 (1-120) 40 col. pis. 
’s Gravenhage (Nijhoff) 1918 4to. 629 
Oort, E. D. van. Omithologische 
waarnemingen in Nederland. Ardea 
Leiden 7 1918 (129-138). 630 
Oort, E. D. van. Resultaten van het 
ringonderzoek van het Rijks Museum 
te Leiden. Ardea Leiden 7 1918 (139- 
143). 631 
Osmaston, B. B. Further notes on 
birds breeding in the Tons valley. 
Bombay J. Nat. Hist. Soc. 25 1918 (493- 
495). 632 
Owen, J. H. Remarkable set of 
Tawny Owl’s eggs. Bt. Bds. London 
12 1918 (20-21). 633 
Owen, J. H. Some breeding habits 
of the Sparrow-Hawk. Bt. Bds. Lon- 
don 12 1918 (61-65 74-82) 5 photos. 
634 
0[wen], J. H. A list of the birds of 
Felstead school. Notes by bird- 
watchers 1916-1917. Folstcad Rep. 
Sell. Sci. Soc. No. 25 1918. 635 
Palm6n, J. A. Salskrakcn och dess 
utbredning. [ Mergus albellus und 
seine Verbreitung.] Helsingfors F . 
Jakttidn. 11 1916 (15-27) pi. 
Palm^n, J. A. S&ngl&rkan. [Alanda 
arvensis].- Helsingfors F. Jakttidn. 
11 1916 (294-307) 2 figs. 637 
Palm€n, J. A. Salskralcens fiyttn- 
ingsvagar. (Zugstrassen von Mergus 
albellus .] Helsingfors Medd. Soc. 
Fauna et FI. Fenn. 42 1916 (33 Deut- 
sches Ref. 162). 638 
Palm6n, J. A. Beringte Vogel in 
Finland im J. 1915. Helsingfors Med. 
Soc. Fauna et FI. Fenn. 42 1916 (111- 
120), 639 
Palmdn, J. A. Engelska omitologen 
John Wolley, jun. [The English 
ornithologist John Wolley, jun.] Hel- 
singfors Medd. Soc. Fauna et FI. Fenn. 
43 1917 (136-137). 640 
Palmer, T. S. The American Ornitho- 
logists’ Union. Amor, Mus. J. New 
York 18 1918 (473-483). 641 
Palmer, T. S. Goudot’s explora- 
tions in Columbia. Auk Cambridge 
Mass. 35 1918 (240-241). 642 
P[almer], T. S. Obituary : Henry 
Reed Taylor. Auk Cambridge Mass. 
35 1918 (382). 643 
Palmer, T. S. Costa’s Humming 
bird, its type locality, early history 
and name. Condor Hollywood Cal. 
20 1918 (114-116): 644 
Palmer, T. S. Pacific coast records 
of the European Wigeon. Condor 
Hollywood Cal. 20 1918 (187-188). 
645 
