352 MANUAL OP PHILIPPINE BIRDS. 



Subfamily 



Genera. 



a 1 . 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 

 more than 150 mm ...................................................................... Chaetura (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 1 . Larger; wing, 115 mm. or more; under parts brown; no white on abdomen. 

 ft 1 . Without whitish or grayish band across rump. 

 c 1 . Tail square; tarsi unfeathered ...................................................... lowi (p. 352) 



c\ Tail slightly forked. 



P. Tarsi entirely devoid of feathers. 



e 1 . Above lighter and more brownish ; below lighter, throat paler. 



whiteheadi (p. 353) 

 e 2 . Above darker, and more blackish ; below darker and more uniform. 



origenis (p. 353) 

 d 3 . Tarsi sparsely feathered ................................................ fuciphaga (p. 354) 



6 2 . A whitish or grayish band across rump ............... _ ................... gcrmani (p. 355) 



a 8 . Smaller; wing, 106 mm. or less; lower parts mottled with white; middle of 



belly extensively white. 

 ft 1 . A white band across the ruinp ............................................ troglodytes (p. 355) 



6*. Without white band on rump. 

 c 1 . Upper tail-coverts margined with white .......................... marginata (p. 356) 



c 2 . Upper tail-coverts concolorous with back .............................. isonota (p. 357) 



312. COLLOCALIA LOWI (Sharpe). 

 LOW'S SWIFTLET. 



Cypselus lowi SHABPE, Proc. Zool. Soc. ( 1879) , 333. 



Collocalia lowi HABTEBT, Cat. Birds Brit. Mus. (1892), 16, 498; SHABPE, 

 Hand-List (1900), 2, 89; GATES and REID, Cat. Birds' Eggs (1903), 

 3, 75; OBEBHOLSEB, Proc. Acad. Nat. Sci. Philad. (1906), 58, 190. 



Salangana lowi MCGBEGOB and WOBCESTEB, 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. 



