454 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



ered by this paper. This is a very difficult genus, and I have quoted 

 few references, as it is liard, without having the specimens upon which 

 an author bases his remarks or records, to allocate them. 



From the specimens that I have identified, I have compiled the 

 following key to the males of the forms recorded from Siam. 



KEY TO THE MALES OF SIAMESE CYORNIS 



o*. Upper parts, throat, and chest porcelain bhie; belly grayish. .unicolor unicolor 

 a'. Upper parts and throat dark blue; belly white or rufous-buff. 

 6'. With no rufous -buff on lower parts. 



c*. Larger, culmen 16 mm or more, with inner web of second, 



third, and fourth outer tail feathers white at base._concreta concreta 



(?. Smaller, culmen about 12 mm, with no white in tail hainana 



fc'. With rufous-buff on lower parts. 



c'. Band on chin very narrow, 6 mm or less; sometimes absent. 



d>. Larger, culmen 14 magnirostris 



d^. Smaller, culmen less than 14 mm. 



e'. llufous-buff lighter and restricted to throat and upper 



chest; belly white tickelliae sumatrensis 



(?. Rufous-buff deeper and extending over chest and breast. 

 /'. Belly white. 



ff'. Chin band very narrow; white on belly more ex- 

 tensive whitei whitei 



(72. Chin band broader, about 6 mm; white on belly 



more restricted whitei caeruleifrons 



p. Belly rufous-buff like breast and chest ruflgastra ruflgastra 



<?. Band on chin broader, 10 mm or more. 



d'. Upper parts dull violaceous-blue; color of chest near 

 ochraceous-buff and not extending so sharply into blue 



of throat rubeculoides dialilaema 



d?. Upper parts indulin blue; chest darker, ochraceous- 

 orange, this color extending sharply into blue of 

 throat rubeculoides glaucicomans 



MUSCICAPELLA HODGSONI HODGSONI (Moore) 



Neviura hodgsoni Moore, Proc. Zool. Soc. London, 1854, p. 76 (Nepal). 



Two males, Doi Nangka, November 10, 1930, April 27, 1931.^° 

 This is a very small bird, wing about 48 mm. Indulin blue above, 

 somewhat brighter on the head; ochraceous-orange below; the fore- 

 head and lores dusky. Dr. Smith records the soft parts as follows: 

 Iris dark brown; bill above black, below dark blue; legs light blue. 



The form ranges from the mountains of Sikkim, Bhutan, and 

 Assam to northern Siam. Tliis record is an extension of the range of 

 this form south from Burma. 



" Recorded by author, Journ. Siam Soc. Nat. Hist. Suppl., vol. 9, p. 169, 1933. 



