316 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Sitta cinnamoventris, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, 



p. 27 (Den Chai, Pak Pan) ; 1916, p. 37 (Pha Kho) ; Journ. Nat. Hist. Soc. 



Siam, 1915, p. 166 (listed) ; Ibis, 1920, p. 467 ("Northern Siam"). 

 Sitta neglecta, Gyldenstolpe, Journ. Nat. Hist. Soc. Siam, 1915, p. 166 (listed) ; 



Kungl. Svenska Vet.-Akad. Handl., 1916, p. 38 (Khun Tan) ; Ibis, 1920, p. 467 



("Northern and north-western Siam"). 

 Sitta Auto-Sitta siamensis Kleinschmidt, Berajah, Zoographia Infinita, 1928, 



p. 14 (Khun Tan, North Thailand). 

 Sitta castanea neglecta, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, p. 174 



(Doi Suthep). — de Sohauensee, Proc. Acad. Nat. Sci. Philadelphia, 1934, 



p. 182 (MaeTaeng). 

 Sitta castanea neglecta [partim], Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 



1936, p. 104 (Doi Suthep [partim ]) .—Riley, U. S. Nat. Mus. Bull. 172, 1938, 



p. 315 (Doi Ang Ka, Mae Khan, Mae Kong Ka valley). 



This nuthatch is generally distributed, although only locally com- 

 mon, in the lowland deciduous forest of all our provinces, ranging 

 from the plains to about 2,000 feet (once a solitary bird on Doi Suthep 

 at 2,800 feet). In the neighborhood of Chiang Mai it is confined to 

 the lower slopes of Doi Suthep, where lone individuals have been ob« 

 served only three times; Chasen and Boden Kloss's record (1932) of 

 a specimen taken by Aagaard at 5,500 feet is here considered referable 

 to JS. e. montium. My own long series of neglecta has been collected 

 from the plains and lower hills of every portion of our area. 



It is usually found in small parties in parklike forest, where the 

 trees are tall and well spaced ; this preference is doubtless responsible 

 for its absence from certain localities which seem to be otherwise quite 

 suitable. Its habits do not differ in any important way from those of 

 montium and the members of the flock converse with the same chatter- 

 ing and twittering. 



The breeding season seems to fall early in the year : a male of May 

 5 is in full ju venal plumage and others, taken between July 10 and 

 21, are in postjuvenal molt. A female of August 30 has completed 

 the molt and is in fine, unworn feather. 



This last specimen had the irides brown; the maxilla black, plum- 

 beous-blue at the base of the culmen; the mandible plumbeous-blue; 

 the feet, toes, and claws slaty. Gyldenstolpe states (1916) that his 

 examples had the irides brown or grayish brown; the bill black or 

 blackish brown ; the feet and toes plumbeous. 



The adult male neglecta has the upperparts like those of montium; 

 the underparts rich chestnut-rufous, becoming albescent on the throat 

 and cheeks; the under tail coverts white, narrowly tipped and edged 

 with chestnut-rufous, the longer ones basally slaty. The adult female 

 differs from the adult male in having the entire underparts and the 

 edging of the under tail coverts vinaceous-buff. Juveniles of either 

 sex resemble the adult female. 



