4 
V. SYSTEMATIC. 
The geographical range of the genus CoUocalia covers India and Ceylon, 
thence south to the Seycheltes and Maiu'itiiis and east through Malaysia and the 
Philippines to the Islands of the Marianane, Marquesas, Society and Tonga groups 
and even to northern Australia. 
In widely scattered localities within tins large range the nests of several 
species are worked for profit under conditions noted in greater detail below. 
Five species of the genus occur in Malaysia-. Four of these are found in 
Borneo and examples of each species together with their nests were examined 
during the recent investigations. 
The fifth species is CoUocalia giga,% the largest member of the genus. Very 
little is known about this rare bird : only a few specimens ai-e known and the.se 
have been obtained in the highlands of the Malay Peninsula, Sumatra and Java. 
It is reasonable to suppose that it also occurs in Borneo but even if it is even- 
tually proved to exist there the species is never likely to be of economic importance. 
The four species w ith %vhich the North Borncan industry is concerned are 
represented by the following forms : — 
CoUocalia brevirostris loici (Sharpe) 
CoUocalia fucipkaga amelis Oberholser 
CoUocaUa francica 7neantsi Oberholser 
CoUocaUa esculenta cyanoptila Oberholser 
1. CoLLOCALiA ifflEviROSTRis Lowi ( Sharpe). 
Hitherto known as C. loici. It is now suggested that in all official 
documents, except those intended for publication in which the full technical 
designation should be printed, this bird should be known as '* The Black-Nest 
SWIFTLET. " 
This is the species responsible for the black nests tliroughout the country. 
Characters— A small dark bird^ slightly glossy on the wings and tail. The 
upper parts are brownish black but the under parts are rather paler or brownish 
grey in colour. The feet (tarsi) are strongly feathered and wing pressed flat 
against a ruler measures from 124 to 137 mm. ( see fig. 1 ). Birds from south- 
eastern Borneo are said to be rather smaller : they have been named tichelmani by 
Dr. Stresemann. 
2. CoLLOCALiA FUcrpHAGA AMELIS Oberh. 
Can conveniently be known as " The Common White-Nest Swiptlet." 
The white nests of the Gomantong caves are made b> this species. 
Characters. — Very like the last species but smaller : the wing pressed flat 
against the ruler measures from 116-126 mm. 
