356 MANUAL OF PHILIPPINE BIRDS. 
and dusky bases and shaft-lines, producing a mottled appearance, the 
white predominating on the abdomen; under tail-coverts glossy black. 
“Very common throughout tM@islands. Builds edible nests. Nests 
always in caves, and composed chiefly or entirely of secretion from the 
mouths of the birds. When the birds are persistently robbed, however, 
they seem to become discouraged, and mix in grass, stems of small plants, 
moss, etc. ‘Two or three white eggs are deposited. They measure: 15.2 
to 17.7 by 10.1 to 10.9. Fourteen males from Siquijor average, 92 in 
length; wing, 92; tail, 41; culmen, 4; tarsus, 8; middle toe with claw, 9. 
Bill, legs, and feet black.” (Bourns and Worcester MS.) 
318. COLLOCALIA MARGINATA Salvadori. 
SALVADORI’S SWIFTLET. 
Collocalia marginata SALvAvorI, Atti. R. Acad. Sei. Torino (1882), 17, 
448; Harrert, Cat. Birds Brit. Mus. (1892), 16, 508; SuHarpr, Hand- 
List (1900), 2, 90; OBERHOLSER, Proce. Acad. Nat. Sci. Philad. (1906), 
58, 203. 
Collocalia cebuensis KurreER, Jour. fiir Orn. (1882), 171. 
Salangana marginata McGreeor and WoRCESTER, Hand-List (1906), 59. 
Ni-do and sa-lum-pi-ping-ao, Calayan. 
Babuyan Claro (McGregor) ; Banton (Celestino) ; Bohol (McGregor) ; Calayan 
(McGregor) ; Camiguin N. (McGregor) ; Cebu (Koch, McGregor) ; Luzon (Othberg, 
McGregor); Masbate (Bourns & Worcester); Mindoro (McGregor); Polillo 
(Ickis *) ; Sibuyan (Jf/cGregor) ; Tablas (Celestino). 
Adult.—Above very dark glossy green, short upper tail-coverts mar- 
gined with pure white; feathers in front of eye white with dusky tips; 
sides of head, neck, and chin mouse-gray ; feathers of throat with narrow 
white edges, posteriorly the white edges gradually increase in width so 
that the abdomen is almost entirely white; under tail-coverts dark glossy 
green with narrow white margins; under wing-coverts narrowly edged 
with white. Iris, bill, toes, and nails black; tarsi dark flesh. Length, 
about 96. Five specimens of each sex from Calayan measure: Males, 
wing, 102 to 107; tail, 40 to 46; females, wing, 102 to 105; tail, 41 to 42. 
Young.—Two nestlings from Sibuyan are like the adult in plumage 
except that the white edges to the upper tail-coverts are but just indicated. 
Bill and nails black ; legs pale flesh. 
Nest.—Nests in small colonies, fastening the nests to the face of a 
rock. The nest is composed of blackish brown hair-moss and held 
together by the characteristic glutenous saliva. The eggs do not differ 
from others of this genus being two in number and pure white in color. 
The eggs of a set collected in Sibuyan, June 11, 1904, measure 18.2 by 
10.9 and 17 by 11.6 mm. 
*The late Mr. H. M. Ickis, geologist, Bureau of Science, found this species 
breeding in the Island of Polillo and collected nests and eggs as well as specimens 
of the bird. 
