COLLOGALIA. 353 
darker shaft-stripes; feathers in front of eye white, broadly tipped with 
black ; under wing-coverts blackish. Length, about 127; bill at base, 4; 
wing, 135; tail, 51; nearly quite even; tarsus, 102; thinly but obviously 
feathered if not abraded by the string of the label.” (Hartert.) 
Young.—Similar to the adult. 
Everett found nesting colonies of Low’s swiftlet in Palawan and in 
northern Borneo during the month of October; the nests were made of 
moss and were fastened to the walls of caves with dry saliva. 
313. COLLOCALIA WHITEHEADI Grant. 
WHITEHEAD’S SWIFTLET. 
Collocalia whiteheadi GRANT, Ibis (1895), 459; SuHarpre, Hand-List (1900), 
2, 89; OBERHOLSER, Proc. Acad. Nat. Sci. Philad. (1906), 58, 192. 
Salangana whiteheadi McGReGor and WorcesTER, Hand-List (1906), 58. 
Collocalia unicolor amelis OBERHOLSER, Proc. Acad, Nat. Sci. Philad. (1906), 
58, 193. 
Bantayan (McGregor); Batan (McGregor) ; Bohol (McGregor) ; Cagayancillo 
(McGregor) ; Cebu (McGregor) ; Luzon (Whitehead, McGregor) ; Mindoro (Mc- 
Gregor, Porter); Sibuyan (McGregor); Palawan (Whitehead, White); Verde 
(McGregor). 
Adult.—Similar to Collocalia lowi in coloration but slightly larger 
with the tail distinctly forked and the tarsi entirely devoid of plumes. 
Iris brown; bill and nails black; legs dark reddish brown. Measure- 
ments from ten skins of each sex from Irisan, Benguet Province, are: 
Males, wing, pressed flat against the rule, 119 to 125; tail, 46 to 51; 
depth of fork, 5 to 8. Females, wing, 118 to 125; tail, 48 to 56; depth 
of fork, 6 to 9. 
Young.—Nestling; similar to the adult but more sooty above and 
lacking the green gloss; lower parts grayer. Iris dark brown; bill and 
nails black; legs pale flesh. 
Nest.—In Benguet Province, Luzon, eggs and nestlings were found 
in June. The nests were made of green moss and placed in a water- 
worn cave. The eggs are pure white. Two specimens measure, respec- 
tively, 22.3 by 13.9 and 23.6 by 14.2. 
314. COLLOCALIA ORIGENIS Oberholser. 
MINDANAO SWIFTLET. 
Collocalia origenis OBERHOLSER, Proe. Acad. Nat. Sei. Philad. (1906), 
58; 191. 
Mindanao (Mearns, Celestino). 
Adult.—“Upper surface uniform brownish black, the rump not lighter 
but wings and the distinctly forked tail more brownish, their feathers 
paler along the inner margins; entire ventral surface uniform smoky 
77719——23 
