KUNGL. SV. VET. AKADEMI KNS HANDLINGAR. HAND 56- -VO 2. 109 



The two specimens collected by mc during iny formor Kxpcdit ion to Siarn and re- 

 corded under fche name of C. m. ambiguus Hart. (Kungl. Svenska Vetenskapsakademiens 

 Handlingar, Band 50, N:o 8, p. 57) have been wrongly identified and ougbt to be referred 

 to the still larger race whieli was described by Tickell under the name of ( '. aUxmotatus. 

 It inhabits the north-western Pro viners of India to Northern Burnia and Siarn. 



On the 10:tli of April I flushed up a female from its nest, wliicli only consisted of 



a slight depression in the ground and contained two fresh eggs of an oval shape. The 



colour is creamy white with brownish spöts and blotches. 



33,9 x 23,7 mm. 



lhey measure: ^ — w 00 



J 32,2 x 23,o mm. 



210. Caprimulgus macrurus bimaculatus. Peale. Horsfield*s Nightjar. 



Caprimulgus macrurus: Williamson I p. 46; Muller p. 403; Oustalet 1903 p. 3; Grant p. 107; Donhote p. 68. 

 Caprimulgus ambiguus: Robinson å Kloss p. 37. 



2 Hue Sai 17 /i 1915. Ii = 290 mm.; W = 197 mm.; T = 156 mm.; C = 9 mm. — Irides; brown. 

 Bill: brown. Legs: reddish brown. 



In the »Siamese Malaya and the southern parts of Siarn the larger C. m. dlbonotatus 

 Tick. is replaced by a smaller race which has been named C. m. bimaculatus by Peale. 



As is shown by Oberholser (Proc. U. S. Nat. Mus., Vol. 48, p. 595, 1915) the Ma- 

 layan form of C. macrurus was named bimaculatus earlier than Hartert gave it the 

 name of ambiguus which name then only becomes a synonym. Both at Hue Sai and 

 Hat Sanuk, j)laces near the Tenasserim boundary on about Lat. No. 12°, this race was 

 rather common, appearing just after sunset in company with Lyncornis cerviniceps 

 Gould. At first they were flying at a considerablé height but getting lower and Iower 

 as it grew darker. I never heard them utter any sound, nor did I flush any specimens 

 from the ground during day-time. 



211. Caprimulgus asiaticus. Lath. — The Common Indian Nightjar. 



Caprimulgus asiaticus: Williamson I p. 46; Oustalet 1903 p. 4; Gairdner p. 150. 



J 1 Koh Lak 2 /i2 1914. L = 210 mm.; W = 141 mm.; T = 106 mm. - - <£ Koh Lak 1J /i 3 1914. 

 L = 212 mm.; W = 145 ram.; T = 113 rara. — 2 Kob Lak ll /ia 1914. L = 204 mm.; W = 141 mm.; 

 T = 108 ram. Iris: brown* Bill: horn colour. Legs: brown. 



Only observed in the southern Districts and around Koh Lak. This Nightjar never 

 occurs in well-wooded träets, but seems to keep entirely to open park-like forests. 



It was generally observed hl pairs and flushed up from the ground, where it roosted 

 among the dry bamboo-leaves and was very difficult to see on account of its pro tec ting 

 colour. This species has also been recorded from Bangkok and its vicinity but was never 

 met with in the northern parts of the country where it is replaced by Caprimulgus monti- 

 cola, Frankl. 



The specimens collected all belong to the dark coloured variety. 



