Vol. xxiii.] 96 



that their ventral surfaces faced one another. He pointed 

 out that normally the tail-feathers were arranged with their 

 bases crowded together in such a way, that, with the exception 

 of the middle pair, which were attached to the pygostyle, 

 they could be moved like the rods of a fan. 



Mr. J. L. BoNHOTE exhibited a hybrid Drake of the 

 second generation containing blood of the following species : 

 Anas hoscas, A. poecilorhyncha, A. super ciliosa, and Dafila 

 acuta. Externally this specimen could hardly be distinguished 

 from a pure-bred Mallard. Although the ancestry of this bird 

 was so complicated as to render it unlikely that all the Mallard 

 characters should occur in one individual, the fact that 

 they had occurred was quite in accordance with the Mendelian 

 Theory. Mr. Bonhote also exhibited and made some 

 remarks on a cross of the second generation between five 

 species (viz. the four mentioned above and a Meller's Duck). 



Mr. CoLLiNGWooD iNaBAM scut for exhibition an example 

 of a new subspecies of Hill- Wren (Pnoepyga) from Mt. 

 Arizan, Central Formosa, and communicated the following 

 remarks : — 



" I have just received a specimen of a Hill- Wren from the 

 mountains of Central Formosa. Messrs. Ogilvie-Grant and 

 La Touche (^ Ibis,' 1907) did not include Pno'epyga in their 

 list of Formosan birds, and I believe that no bird of this 

 genus has ever been recorded from that island. My 

 specimen apparently belongs to an undescribed subspecies 

 allied to P. albiventris (Hodgs.). In size it is intermediate 

 between P. albiventris and P. pusilla, Hodgs. Besides being 

 smaller it differs from the former species in having the 

 back darker and more olivaceous, and in lacking the rufous 

 wash which is especially noticeable on the wings of the 

 typical P. albiventris. The upper surface is also much 

 more closely and distinctly spotted with light rufous-bufi', 

 the maculations being almost uniform in appearance, and 

 particularly numerous on the head. The white on the under 

 surface is purer and seems to extend further down the 

 belly and flanks. Length of wing 2*2 inches ; culmen 0*5. 



