442 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Soc. Nat. Hist. Suppl., 1931, p. 144 (Doi Suthep [partim]) ; 1936, p. 118 

 (Doi Suthep [partim]). 



This putative race is based upon a unique adult female taken by me 

 on Doi Suthep, 5,500 feet, November 7, 1936; with it I have pro- 

 visionally placed three adult males collected by de Schauensee on 

 Doi Suthep (December), Doi Pha Horn Pok (February), and Kiu 

 Loi, Kengtung State (February). It is assumed to be a form which 

 breeds in the Southern Shan States and reaches Thailand only dur- 

 ing the cold weather. 



"The type specimen differs most strikingly from the corresponding 

 sex of both strophiata and fuscogularis (Annam) in wholly lacking 

 a gorget. The chin, throat, and center of the upper breast are uni- 

 formly of a color which lies between buckthorn brown (Ridgway) 

 and isabella color (Ridgway) and which changes imperceptibly into 

 the olivaceous-brown of the sides of the breast and the flanks; all 

 the feathers of the throat and breast have the concealed bases dark 

 slate-gray and the concealed portion of the shaft white; the lores, 

 supercilia, ear-coverts, and sides of the neck are dark brownish slate, 

 not pure slate-gray as in the other races. . . . 



"The three adult males which presumably belong here differ from 

 the corresponding sex of strophiata and fuscogularis in having the 

 gorget so much reduced in area, both the orange and the white por- 

 tions, but especially the former, that it is almost or entirely invisible 

 until the feathers of the breast are raised" {ex original description). 



SIPHIA HODGSONII Verreaux 



Slaty-backed Flycatcher 



Siphia hodgsonii Verreaux, Nouv. Arch. Mus. [Paris], vol. 6, 1870 [= 1871], 



Bull., p. 34 (Mu-pin, Chinese Tibet). 

 Alseonax latirostris latirostris [partim], Deignan, Journ. Siam Soc. Nat. Hist. 



Suppl., 1931, p. 144 (Doi Suthep [partim]). 

 Siphia hodgsonii, Chasen and Boden Kloss, Journ. Siam Soc. Nat. Hist. Suppl., 



1932, p. 239 (Doi Suthep). 

 Muscicapnla hodgsonii, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 1934, 



p. 213 (Doi Suthep).— Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, 



p. 118 (Doi Suthep).— Green way, Bull. Mus. Comp. Zool., 1940, p. 182 (Doi 



Ang Ka). 



The slaty-backed flycatcher is a rare winter visitor to the higher 

 peaks of the Thanon Thong Chai range, recorded until now only 

 between January 9 (Doi Suthep) and March 31 (Doi Ang Ka). On 

 Doi Suthep it has been found from 4,600 to 5,500 feet; on Doi Ang 

 Ka, from 4,300 feet to the summit. 



This species occurs in the same places as Siphia strophiata and 

 seems to have quite the same habits. 



An adult female had the irides brown; the bill, feet, toes, and 

 claws blackish brown. A bird sexed by me as a female (but wearing 



