344 MR. H. SEEBOHM ON BIRDS [Apr. 15, 



slaty green, like those of Liothrix argentauris, instead of being 

 rufous green, and the general colour of the upper parts is of a bluer 

 green than in Liothrix calipyga. 



Paradoxornis guttaticollis, David, Nouv. Archives, 1H71, 

 Bull. p. 14. 



Paradoxornis pileo rufo, guld albci nigra sagittatd. 



Herr Baun obtained an example of this curious bird at Ching- 

 fung on the 13th of October. It measures 3'6 inches in length of 

 wing, and A'7 inches in length of tail. The type oi Paradoxornis 

 austeni {GoxAdi, Birds of Asia, iii. pi. 73) is a smaller bird, measuring 

 only 3'1 inches in length of wing, and 3'2 in length of tail, and has 

 all the appearance of being in immature plumage. There is a fine 

 series in the Hume collection which agree in dimensions with the 

 Chinese examples, so that there can be little doubt of the absolute 

 identity of the Himalayan and Chinese birds. 



SuTHORA BULOMACHus, Swinhoc, Tbis, 1863, p. 300. 



This species has hitherto been supposed to be peculiar to the 

 island of Formosa, but Herr Baun has sent two examples collected 

 at Fuelling (one in February and the other in May), which are very 

 conspicuously streaked on the throat, and in the richness of the 

 chestnut on the crown are intermediate between the types of 

 Suthora bulomachus and Suthora suffusa, both of which are in the 

 S win hoe collection. 



LaNIUS BUCEPHALUS. 



Herr Baun has sent two examples of this Shrike collected at 

 Puching, one in September and the other in December. 



Parus venustulus, Swinhoe, Proc. Zool. Soc. 1870, p. 133. 



Herr Baun has sent two examples of this rare Tit from Puching, 

 collected on the 1.5th and 16th of November. One of them agrees 

 with the type in the Swinhoe collection, but the other is very 

 different. The blue-blark on the head, neck, back, wing-coverts, and 

 tertials is replaced by olive-green, and the white on the nape is 

 suffused with yellow. It is probably a bird of the year. 



SiTTA C^SIA SINENSIS. 



Two Nuthatches collected by Herr Baun at Puching, one in 

 March and the other in April, only differ in size, and that very 

 slightly, from examples from South Europe. They measure 2-95 

 inches in length of wing from carpal joint. 



The variations of colour in the races of the Common Nuthatch 

 appear to be climatic, and correspond to a remarkable degree with the 

 July isothermal lines of mean temperature. Nuthatches moult only 

 once in the year, and July is probably the month when most of the 

 new feathers are formed. The Kamtschatkan race is the palest, as 

 it is of the various climatic races of Parus palustris, Pyrrhula vulgaris. 

 Pica catidaUt, &c. It moults in a mean temperature of .54° to 58° ; 



