KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 56. N:0 2. 109 
The two specimens collected by me during my former Expedition to Siam and re- 
corded under the name of (. m. ambiguus Hart. (Kungl. Svenska Vetenskapsakademiens 
Handlingar, Band 50, N:o 8, p. 57) have been wrongly identified and ought to be referred 
to the still larger race which was described by TickELL under the name of C. albonotatus. 
It inhabits the north-western Provinces of India to Northern Burma and Siam. 
On the 10:th of April I flushed up a female from its nest, which 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 spots and blotches. 
33,9 X 23,7 mm. 
32,2 <x 23,0 mm. 
They measure: 
210. Caprimulgus macrurus bimaculatus. Prate. — Horsfield’s Nightjar. 
Caprimulgus macrurus: Williamson I p. 46; Miller p. 403; Oustalet 1903 p. 3; Grant p. 107; Bonhote p. 68. 
Caprimulgus ambiguus: Robinson & Kloss p. 37. 
© Hue Sai 17/1 1915. L = 290 mm.; W = 197 mm.; T = 156 mm.; C = 9 mm. — Trides; brown. 
Bill: brown. Legs: reddish brown. 
In the Siamese Malaya and the southern parts of Siam the larger C’. m. albonotatus 
Tick. is replaced by a smaller race which has been named C. m. bimaculatus by PEALE. 
As is shown by OBERHOLSER (Proc. U. 8. 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, places near the Tenasserim boundary on about Lat. No. 12°, this race was 
rather common, appearing just after sunset in company with Lyncornis cerviniceps 
Goutp. At first they were flying at a considerable height but getting lower and lower 
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. Latu. — The Common Indian Nightjar. 
Caprimulgus asiaticus: Williamson I p. 46; Oustalet 1903 p. 4; Gairdner p. 150. 
S$ Koh Lak */2 1914. L == 210 mm; W = 141 mm; T = 106.mm. — ¢ Koh Lak "/y2 1914. 
== 212 mm; W= 145 mm; T= 113 mm. — @ Koh Lak “/ 1914. L = 204 mm; W = 141 mn; 
= 108 mm. Iris: brown. Bill: horn colour. Legs: brown. 
L 
T 
Only observed in the southern Districts and around Koh Lak. This Nightjar never 
occurs in well-wooded tracts, but seems to keep entirely to open park-like forests. 
It was generally observed in 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 protecting 
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. 
