186 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



This goatsucker rests during the day in much the same type of 

 environment as C. a. monticolus, but I have never found the two species 

 actually together. At Chiang Mai, the present form could always be 

 seen at a place along the Mae Rim road, near Wat Phranon, where 

 clumps of bushes alternate with small, open spaces of low grass. At 

 night it occurs even in the town, if I am not wrong in attributing to 

 it the hollow-sounding tok-tok-tok-tok-tok, which is a familiar noc- 

 turnal call there. 



A bird from Doi Chiang Dao, 4,600 feet, March 19, had the testes 

 greatly enlarged. Gyldenstolpe records (1916) that he found (either 

 at Pha Kho or Pha Hing) two fresh eggs in a nest which was merely 

 a slight depression in the ground, April 10, 1914. I took a juvenile 

 at Doi San Huai Wai, June 4, and a subadult at Chiang Mai, July 16. 



A male had the irides brown ; the bill brown, tipped black ; the feet 

 and toes pinkish brown. 



The adult male is rather like the corresponding sex of G. i. jotaka 

 but has an indistinct dull rusty nuchal collar, conspicuous buff-edged 

 black markings on the scapulars, and the two outer pairs of tail 

 feathers with a broad, terminal white band. The adult female is 

 similar and has the tail pattern of the male, but with the terminal bands 

 sullied buff instead of white. The juvenile resembles the adult female 

 but has the plumage very much paler throughout. 



The wing lengths of six adult males from northern Thailand meas- 

 ure from 203 to 218 mm. ; of two adult females, 198 and 198.5 mm. 



CAPRIMULGUS ASIATICUS SIAMENSIS de Schauensee 



Thai Little Nightjar 



Caprimulgus asiaticus siamensis de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, vol. 85, 1933 [=1934], p. 373 (Chiang Mai, North Thailand). 



Caprimulgus asiaticus siamensis, de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1934, p. 267 (Chiang Mai). — Deignan, Journ. Siam Soc. Nat. Hist. 

 Suppl., 1936, p. 90 (Chiang Mai). 



This small species is probably common throughout our provinces, 

 although examples have been taken only at Chiang Mai and Chom 

 Thong. I have heard its unmistakable call at Ban Huai Oi (Nan Prov- 

 ince) in April. 



In the neighborhood of Chiang Mai de Schauensee took numerous 

 specimens flying above the parade ground at nightfall. I found it 

 resting during the day on lightly shaded rocks and on the hard ground 

 in the dry forest at the foot of Doi Suthep, but only up to 1,300 feet. 

 The usual call is a distinctive took-took-chuckeroo, and I suspect that 

 this bird is the author of the sharp peenk (like that of the American 

 Chordeiles minor) sometimes heard before dawn at the base of Su- 

 thep. The stomach of one of my specimens was filled with beetles. 



