ART. 7 BIEDS FROM YUNNAN AND SZECHWAN, CHINA EILEY 67 



199. NILTAVA SUNDARA DENOTATA Bangs and Phillips 



Niltava svndara denotata Bangs and Phillips, Bull. Miis. Comp. Zoul., vol. 58, 

 p. 280, 1914 (Mengtsze, Yunnan). 



Three adult males, two immature males, and one immature female, 

 northwest Yunnan (Likiang Mountains, October; Fungkou, 9,000 

 feet, May; Luddii Mountains, 12,000-13,000 feet, August; Fuchuan- 

 shan, 10,000-12,000 feet, September) ; one adult male and one imma- 

 ture female, southwest Szechwan (Yanwekong, 10,000-12,000 feet, 

 May; forests of Noon, east of Muli, 10,500 feet, August). 



The two immature males and the two immature females are in the 

 spotted plumage. The United States National Museum contains 

 two additional immature males in the spotted plumage from Doctor 

 Rock's first expedition in Yunnan. The immature males vary some- 

 what in plumage and are probably not quite the same age, though 

 approximately so. Irrespective of the slight age variations in these 

 immature males, they all have the blue tail like the adult. One 

 specimen is acquiring a blue rump and has a few blue feathers on 

 the nape and lesser wing coverts; the Mars-yellow breast is being 

 acquired in the two lateral feather tracts; the remiges are new and 

 are blue outwardly at the base only, brownish toward the tip. The 

 adult male plumage evidently is acquired at the first molt, except for 

 the remiges. The two immature females in the spotted plumage of 

 apparently the same age aS the above spotted immature males have 

 the tail brown like the adult female; they also have the white jugular 

 patch and the white belly of the adult female. None of the spotted 

 males has the jugular patch or belly white, but fulvous. Now in 

 these two spotted females the remiges are new and resemble those 

 of the adult female. All these spotted young, whether male or 

 female, have acquired the tail of the first winter plumage. The in- 

 teresting point is that the sexes become differentiated at a very early 

 stage. They are probably only similar in the nestling plumage and 

 the series of young before me seems to indicate that the female even 

 then differs from the male in having the jugular patch and belly 

 white. 



200. SIPHIA STKOPHIATA Hodgson 



Siphla strophiafa Hodgson, Indian Rev., vol. 1, p. 651, 1837 (Nepal). 



One male from northwest Yunnan (Yungning, 12,000 feet, May) ; 

 three males and three females from southwest Szechwan (forests of 

 Muli, 10,000 feet. Ma}'; forests of Djishigotong, Yalung Basin, north- 

 east of Muli, 13,000 feet, July; Dshizhi, 13,500 feet, April; Yanwe- 

 kong, 10,000-12,000 feet. May). 



