THE BIRDS OF NORTHERN THAILAND 223 



Thereiceryx lineatus hodgsoni, Gyldenstolpe, Ibis, 1920, p. 597 ("Northern 

 Siani"). — de Schatjensee, Proc. Acad. Nat. Sci. Philadelphia, 1928, p. 574 

 (Doi Suthep). 



Thereiceryx lineatus intermedins, de Schatjensee, Proc. Acad. Nat. Sci. Phil- 

 adelphia, 1929, p. 568 (Doi Suthep, Chiang Rai) ; 1934, p. 254 (Mae Taeng, 

 Khun Tan, Doi Suthep). — Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, 

 p. 158 (Doi Suthep, Chiang Mai) ; 1936, p. 95 (Doi Suthep, Chiang Mai).— 

 Rieey, U. S. Nat. Mus. Bull. 172, 1938, p. 199 (Mae Hong Son, Mae Lang 

 valley, Mae Suya valley, Thattafang, Doi Ang Ka, Lampang, "Doi Phra 

 Chao" [=Doi Saket?], Nan, Ban Nam Khian). 



The lineated barbet abounds in the dry, deciduous forest of all the 

 northern provinces; it occurs chiefly on the plains but ascends the 

 hills to the altitudinal limit of this type of vegetation, on Doi Ang 

 Ka reaching about 2,500 feet, on Doi Suthep, 2,700 feet. So general 

 is its distribution that it has been recorded by every collector from 

 virtually all localities where work has been done. 



This is the green bird with brownish head and breast and light- 

 colored bill that, perched at the top of a leafless tree, calls bang-kok, 

 bang-kok, bang-kok, at regular intervals all through the heat of the 

 day. While really an inhabitant of the pa daeng, a wandering indi- 

 vidual may appear at times in a village garden and I have once or 

 twice heard it even in the center of Chiang Mai. All stomachs I 

 examined contained wild fruit. 



Breeding seems to take place throughout the hot weather. An ex- 

 ample with enlarged gonads was collected March 7 and several ju- 

 veniles wearing heel pads were taken in August. From May 27 to 

 October 19 all adults examined are in molt. Owing to the leathery 

 foliage among which the species lives, the plumage becomes very 

 frayed and bleached and the color differences between fresh and worn 

 birds are striking. 



A male in breeding condition had the irides violet-red ; the eyelids 

 and orbital region deep yellow; the bill pale creamy flesh, with the 

 extreme tip and the edges of the commissure horny gray, the extreme 

 base of the maxilla deep yellow; the feet and toes chrome yellow; 

 the claws dark horn-brown. 



This species in unworn dress has the entire head, neck, breast, and 

 upper abdomen buffy gray, each feather (except on the throat) broadly 

 edged with deep brown, so that these parts appear heavily streaked 

 light and dark; the remaining upperparts bright, deep green, 

 with pale shaft streaks on the upper back ; the remaining underparts 

 bright yellow-green, somewhat streaked with deeper green ; the under 

 surface of the tail blue-green. Through fading and wear the dark 

 edgings of the feathers of head and breast become paler or even wholly 

 disappear, so that these parts are more or less uniformly colored. 



