106 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
A nest of this fine species was found on the 11th of March 1914 at the neighbourhood 
of Pak Koh. It was placed in an open hole of a decayed tree and contained two café-au- 
lait coloured eggs. There was not the slightest trace of a nest and only a few pieces 
of wood constituted the bottom. 
23,7 X 23,2 mm. 
20,5 x 20,5 mm. 
Measurements of eggs: 
Fam. Cypselide. 
203. Cheetura sp. 
During my stay at a small river called Hue San Noi about one day’s march south 
of Chieng Hai, I observed some specimens of a Chetura (probably Chetura gigantea in- 
dica HumE which I previously found in similar conditions in Northern Siam) flying up 
and down the small river just before dusk. 
Some other specimens were also observed at the neighbourhood of Pak Koh on the 
18th of March 1914. 
204. Collocalia francica germaini. Oust. — The Little Grey-rumped Swiftlet. 
do Koh Lak “/i 1914. L = 125 mm.; W = 116 mm.; T = 55 mm.; C = 4,5 mm. — @ Koh Lak 
M/ye 1914. I, = 115 mm.; W = 119 mm.; T = 54,5 mm.; C = 4 mm. — Iris: black. Bill: black. Legs: 
brown. 
Both the specimens of Collocalia I obtained near Koh Lak in the Siamese Malaya 
ought to be referred to the race described by OvusTaLzET (Bull. Soc. Philom. France, 1876) 
under the name of Collocalia germaini. One of my specimens (¢) is, however, practically 
intermediate between this race and C. francica inexpectata HumME from the Andaman 
Islands. This male specimen has the upper surface of the body decidedly darker and the 
rumpband is of a smoky brown colour; the black shaft-stripes of the rump-feathers are, 
however, very conspicuous, hence declining to C. francica germaini. 
In the general appearance this race is very similar to C. f. terreregine Ramsay, 
from Australia, but is distinguished by greater size and by having darker upper parts. 
OBERHOLSER in his »Monograph of the Genus Collocalia» (Proc. Acad. Nat. Science. 
Philadelphia, Vol. 58, 1906, p. 198) gives the wing in C. francica terreregine as measuring 
110—111 mm. and Srresemann (Novitates Zoologice, Vol. 19, 1912, p. 351) records 
the wing as 111—116 mm. 
Two specimens (Jo) of C. francica terreregine from Queensland in the collections 
of the R. Nat. Hist. Mus. in Stockholm have the wings measuring 115—117 mm.; tail = 
65—59 mm. and the tarsus 10—9,5 mm. 
At the neighbourhood of Koh Lak these Swiftlets were rather common from No- 
vember to the end of January and mixed up together with Apus affinis subfurcatus 
Biytu., though always rather difficult to obtain on account of their flying at a 
considerable height. 
