352 MANUAL OF PHILIPPINE BIRDS. 
Subfamily CH 4ZTURIN 22. 
wr 
@. Shafts of rectrices ordinary and without spinous tips; wing less than 140 mm. 
Collocalia (p. 352) 
a. Shafts of rectrices stiff and extending in a sharp point beyond the web; wing 
miore: than Wb O) rans oes ae sarees ee eco ern cetaea dene coat tsccee Chetura (p. 357) 
Genus COLLOCALIA Gray, 1840.* 
Hind toe directed backward and only partially reversible; tail short, 
square or but slightly forked; shafts of rectrices normal, not extending 
beyond the webs. This genus includes numerous small swifts, several of 
which build the edible nests of commerce. 
Species. 
a. Larger; wing, 115 mm. or more; under parts brown; no white on abdomen. 
b%. Without whitish or grayish band across rump. 
¢. Tail square; tarei pnteathened zs .2.14565 coho beet dal Ree lowi (p. 352) 
c. Tail slightly forked. 
@. Tarsi entirely devoid of feathers. 
e’. Above lighter and more brownish; below lighter, throat paler. 
whiteheadi (p. 353) 
e’. Above darker, and more blackish; below darker and more uniform. 
origenis (p. 353) 
a7 Warsi sparsely; feathered) ces cccccesecccte eee sree ere eee fuciphaga (p. 354) 
b*. A whitish or grayish band across rump................-.-2-::-----0-00-+ germani (p. 355) 
a’, Smaller; wing, 106 mm: or less; lower parts mottled with white; middle of 
belly extensively white. 
ps VA white band across their wip sooo eee ned troglodytes (p. 355) 
b?. Without white band on rump. 
c'. Upper tail-coverts margined with white............0..00........ marginata (p. 356) 
c’. Upper tail-coverts concolorous with back...........-..----...--...--- isonota (p. 357) 
312. COLLOCALIA LOWI (Sharpe). 
LOW’S SWIFTLET. 
Cypselus lowi SHARPE, Proc. Zool. Soc. (1879), 333. 
Collocalia lowi Harrert, Cat. Birds Brit. Mus. (1892), 16, 498; SHARPE, 
Hand-List (1900), 2, 89; OaTres and REID, Cat. Birds’ Eggs (1903), 
3, 75; OBERHOLSER, Proce. Acad. Nat. Sci. Philad. (1906), 58, 190. 
Salangana lowi McGrecor and WorcESTER, Hand-List (1906), 58. 
Palawan (Everett, Whitehead, Steere Exp.). Northern Borneo, Anamba Islands, 
accidental in Sumatra and on Nias Island. 
Adult.—“Upper surface sooty black with a little greenish gloss, some- 
what purplish on the tail; lower surface brownish gray, with somewhat 
*The name Salangana Saint-Hilaire, 1837, proposed by Richmond to replace 
Collocalia, proves to have been used in a vernacular sense and therefore is not avail- 
able. Cf. Oberholser, Proc. Acad. Nat. Sci. Philadelphia (1906), 58, 178. 
