1920.] Recently published Ornithological Works. 729 



names a new Swallow from Western Canada, Petrochelidon 

 albifruns hypopolia, and discusses the distribution of the 

 races of the species involved. 



Journal of the Natural History Society of Siam. 



[Tlie Journal of tlie Nutural History Society of Siam. Vol. iii. 

 Nos. 1-3, Nov. 1918-Au;?. 1919.J 



In the first two numbers Mr. W. J. F. Williamson 

 writes on important bird-records from Siam, and ou the 

 breeding of certain Terns (Sterna bergii^ S. melanauchen, 

 and S. ancestheta). The bird-records are nearly all of forms 

 Avhich are new to the country or have been lost sight of, 

 but the details of distribution must be left to our readers 

 to study. 



A more important article is that by Messrs. Kobinson 

 and Kloss ou a collection made by them at Puket Island 

 oft' peninsular Siam, to be compared with Count Gylden- 

 stolpe^s " List," which we are now publishing. In spite of 

 the efforts of former collectors the authors are able to 

 separate three new races (^Cyanops mystacophanes aurantii- 

 frons, Mesobncco duvauceli stuarti, and Chloropsis cyanopogon 

 septentrionalis), and add two species of Pericrocotus to the 

 list of birds occurring in the Peninsula. They were struck 

 by the numbers of Baza lophotes seen, and obtained one 

 example of the rare Monticola gularis. 



In the third number Mr. Stuart-Baker gives a long 

 account of a very noteworthy collection of birds formed by 

 Mr. E. G, Herbert in Siam, and presented to the Britisli 

 Museum ; here we should like to call attention to the 

 large number of Siamese forms which are jiovv relegated 

 from specific to subspecific value, besides the new races 

 also in considerable numbers. Everyone interested in the 

 fauna of the Oriental Region should study this paper, which 

 is to a certain extent a summary of Siamese Ornithology, 

 though in the form of an annotated list, and no one should 

 fail to read the comparatively new journal in which it is 

 contained. 



