AKT. 7 BTEDS FROM YUNNAN AND SZECHWAN, CHINA — RILEY 51 



Ronopien region, Shouclm River Basin, 15,000 feet, August; Yu- 

 longhsi Valley, 13,000-16,000 feet. May; Minya Mountains, 14,500 

 feet, no date). 



Five males from Sungpan are less heavily streaked on the breast, 

 but the difference is slight and may be more apparent than real. The 

 Sungpan skins are not in very good condition. 



Family TURDIDAE, Thrushes 



147. HETEROXENICUS CRURALIS FORMASTER Thayer and Bangs 



Heteroxenicus cruralis formatter Thayer and Bangs. Mem. Mns. Comp. Zool.. 

 vol. 40, no. 4, p. 169, 1912 (Mount Washan, Szeehwan). 



One adult female, Likiang Mountains, Yunnan, October. 



When I published a paper on Doctor Rock's first expedition to 

 Yunnan for the National Geographic Society a series of this form 

 was doubtfully identified as Heteroijeenimis sinensis.^* At that time 

 there was no specimen of the latter in the United States National 

 Museum, and I relied upon descriptions for identification. Since 

 then I have seen the series in the Museum of Comparative Zoology, 

 and the National Museum has acquired by exchange a pair of H. 

 sinensis from the type locality. The Likiang specimens are entirely 

 different, much larger and darker; about as different as two species 

 well could be. The male of sinensis is dark plumbeous above; slate 

 gray below; the throat, middle of the breast, belly, and inider tail 

 coverts tinged with white; lores slate color; superciliary white. 

 The male of forinaster is dusky slate blue above; the tliroat either 

 dusky slate blue or bluish black; the breast dusky slate blue; the 

 middle of the abdomen barely tinged with deep neutral gray; lores 

 black; superciliary white. The females of the two species are quite 

 I listinct also. The female of formaster is rustier on the forehead and 

 deeper colored above; the abdomen grayish; and tliere are many 

 other differences, but size alone is sufficient. 



The bird listed at the head of this account is not quite the same 

 as the previous series from Yunnan. It is more olivaceous above 

 and below and not so rusty on the forehead. It is a fall bird, while 

 the previous series were taken in summer, and the difference may be 

 sea.sonal. 



The type of Heteroxenicus cruralis laurentei LaTouche "'' is now in 

 (he Museum of Comparative Zoology and has been kindly loaned 

 to me by tlie authorities of that institution for comparison. Without 

 much doubt it is the same as the birds I formerly identified as H. 

 sinensis^ and which is also the H. sinensis of Stuart Baker.®" La- 

 I'ouche overlooked Thayer and Bangs's description of foiminster^ and 

 evidently Stuart Baker did also. It is very doubtful to my mind if 



•^iProc. U. S. Nat. Mus., vol. 70, art. 5, p. .SO, 1926. 



'=5Bull. Brit. Oni. Club, vol. 42, p. 29. 1921. 



"■■s Fauna of British India, Birds, ed. 2, vol. 2, p, 1924. 



