FUR-SEAL INDUSTRY. 105 
as compared with 154 for 1915. A total of 20 animals was used for 
food on both islands during 1918. 
Since the reindeer subsists during the winter upon one or two 
species of lichens, which are of very slow growth and of limited distri- 
bution on the Pribilofs, the Bureau plans to institute an inquiry into 
the probable maximum size of herds which can be continually main- 
tained on each island. 
BIRDS. 
During the course of several years at the Pribilof Islands, Dr. 
G. Dallas Hanna has from time to time devoted considerable study to 
the enormous numbers of birds in that region. As the result of his 
prec aulne the following has been recently submitted by Dr. 
anna: 
The enormous numbers of sea birds which nest on the Pribilof Islands form one of 
the most interesting spectacles to be found there. Some of the species have been 
estimated in millions. 
Many employees have given the subject a share of attention during their residence 
there, and the islands have thus come to be better known in this respect than any 
similar area in Alaska. Collections have been sent in from time to time, and almost 
without exception they contained some species which attracted unusual attention. 
Stragglers arrive from all directions and a considerable number of them may be ex- 
pected every year. The total number of species which breed or are found regularly 
in migration is only 45; but the number of stragglers has swelled the list to 129. Of 
these no less than 14 represent the first records of the species having been secured in 
North America. Five others were originally described from this locality. 
Specimens have been collected of all except 6 of these 129 species, and of those col- 
lected the U. 8. National Museum possesses specimens from the islands of all but one. 
While it is impracticable at the present time for any of the Pribilof employees to 
devote much time to the collection of birds, owing to the shortage of assistants, the 
Bureau encourages the preservation of any specimens which may appear strange or 
which possess some unusual interest. 
The list which follows was originally prepared by Dr. C. W. Richmond, of the 
National Museum, for use on the islands in recognizing other desirable species. It 
has been added to by the present writer after completing the study of the last collec- 
tion he brought from the islands. Names have been corrected and slight changes 
made by Dr. H. C. Oberholser, of the Bureau of Biological Survey. 
CHECK LIST OF BIRDS OF THE PRIBILOF ISLANDS, ALASKA, WITH THE NAMES OF 
PERSONS FIRST RECORDING THE SPECIES FROM THE ISLANDS. 
Colymbus holbellii. Holbeell’s Grebe. | Cepphus columba. Pigeon Guillemot. 
ELLIOTT. 
Colymbus  auritus. Horned Grebe. 
HANNA. 
Gavia adamsi. Yellow-billed Loon. 
TOWNSEND. 
Gavia arctica. Black-throated Loon. 
ELuiort. 
Lundacirrhata. Tufted Puffin. Co1npe. 
Fratercula corniculata. Horned Puffin. 
ELuiorr. 
Phaleris psittacula. Paroquet Auklet.¢ 
COINDE. 
4ithia cristatella. Crested Auklet.¢ 
COINDE. 
4Zithia pusilla. Least Auklet.¢ Cornpe. 
Synthliboramphus antiquus. Ancient 
Murrelet. Dati and BANNISTER. 
Brachyramphus =marmoratus. Marbled 
Murrelet. HANNA. 
NELSON. 
Uria troille californica. California Murre.¢ 
ELuiort. 
Uria lomvia  arra. Pallas’s Murre.a 
Dati and BANNISTER. 
Coprotheres pomarinus. Pomarine Jaeger. 
ELiiorr. 
Stercorarius parasiticus. Parasitic Jaeger. 
Eviiorr. 
Stercorarius _—_ longicaudus. Long-tailed 
Jaeger. Enuiorr. 
Rissa tridactyla pollicaris. Pacific Kitti- 
wake.@ CoINnDE. 
Rissa _ brevirostris. Red-legged Kitti- 
wake.@ CoINDE. 
Pagophila alba. Ivory Gull. Patmer. 
Larus hyperboreus hyperboreus. Glaucous 
Gull.¢ OBERHOLSER. 
Larus hyperboreus barrovianus. PALMER. 
a Species which breed regularly. The mallard and green-winged teal have also been known to nest on 
St. Paul once each. 
> Regular migrants. 
