THE BIRDS OF NORTHERN THAILAND 27 



6. Laboratory of Ornithology, Cornell University, Ithaca, N. Y. 



7. Museum of Zoology, University of Michigan, Ann Arbor, Mich. 



8. British Museum (Natural History), London. 



9. Museum d'Histoire Naturelle, Paris. 



10. Zoologisches Museum der Universitat, Berlin. 



11. Naturhistoriska Riksmuseum, Stockholm. 



12. Landesmuseum, Hannover. 



13. Naturhistorisches Museum, Vienna. 



14. Raffles Museum, Singapore. 



Among the many ornithologists who have given me especial aid 

 and advice must be mentioned Dr. Alexander Wetmore, Dr. Herbert 

 Friedmann, and the late J. H. Riley, my colleagues at the United 

 States National Museum ; Rodolphe M. de Schauensee, of the Phila- 

 delphia Academy of Natural Sciences, who relinquished in my favor 

 his prior claim to the investigation of northern Thai ornithology 

 and has ever been most generous in sharing with me his discoveries ; 

 Dr. Ernst Mayr, of the American Museum of Natural History ; Jean 

 Delacour, of the New York Zoological Society, whose knowledge of 

 Indo-Chinese birds is unexcelled; F. N. Chasen, of the Raffles Mu- 

 seum; Charles H. Rogers, of the Princeton Museum of Zoology; 

 James C. Green way, Jr., and James L. Peters, of the Museum of Com- 

 parative Zoology ; the late Dr. C. B. Ticehurst, who was my host for a 

 memorable ornithological weekend at his home in England; Sir 

 Walter J. F. Williamson, C. M. G., of London ; Count Nils Gylden- 

 stolpe of the Riksmuseum at Stockholm ; Dr. Erwin Stresemann, the 

 renowned authority on birds at the University of Berlin. 



The photographs used on plate 3 were purchased from Tanaka, 

 a commercial photographer; the one used for plates 8, C, was taken 

 by Kenneth E. Wells; for all others I owe thanks to David H. 

 Dickason. 



Finally, my gratitude is due those who have given me clerical help, 

 especially Miss Hilda Schmaltz of the division of birds, United States 

 National Museum, who has handled the trying tasks involved in 

 preparing the final draft of my work. 



ANNOTATED LIST OF BIRDS 



The order of families followed in subsequent pages is almost iden- 

 tical with that proposed by Wetmore; the order of genera is based 

 largely upon my personal views but, in some families, also those of 

 Mayr and Delacour. Throughout I have been governed by conser- 

 vatism in the use of generic names, by liberalism in the recognition of 

 subspecies. 



In certain cases I have been compelled to adopt the concept of the 

 superspecies. Inasmuch as, under the rules of the International Code 



583136 — 45 3 



