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 the 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 MARGIN ATA Salvador!. 

 SALVADOKI'8 SWIFTLET. 



Collocalia marginata SALVADOBI, Atti. R. Acad. Sci. Torino (1882), 17, 

 448; HABTERT, Cat. Birds Brit. Mus. (1892), 16, 508; SHARPE, Hand- 

 List (1900), 2, 90; OBEBHOLSEB, Proc. Acad. Nat. Sci. Philad. (1906), 

 58, 203. 



Collocalia cebuensis KUTTEB, Jour, fiir Orn. (1882), 171. 



Salangana marginata McGBEooa and WORCESTEB, Hand-List (1906), 59. 



Ni-do and sa-lum-pi-ping-ao, Calayan. 



Babuyan Claro (McGregor) ; Bunion (Celcstino) ; Bohol (McGregor) ; Calayan 

 (McGregor) ; Camiguin N. (McGregor) ; Cebu (Koch, McGregor) ; Luzon (Othberg, 

 McGregor); Masbate (Bourns & Worcester); Mindoro ( M cGregor ) ; Polillo 

 (Ickis*) ; Sibuyan (McGregor) ; 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. 



