352 MANUAL OF PHILIPPINE BIRDS. 



Subfamily CH^^TURIN^^. 



Genera. 



a^. Shafts of rectrices ordinary and without spinous tips; wing less than 140 mm. 



Collocalia (p. 352) 



or. 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 wel)s. 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. 

 6\ Without whitish or grayish band across rump. 



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



c^ Tail slightly forked. 



d^. Tarsi entirely devoid of feathers. 



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



whitehead! (p. 353) 

 e". Above darker, and more blackish ; below darker and more luiiform. 



origenis (p. 353) 



cP. Tarsi sparsely feathered fuciphaga (p. 354) 



6^ A whitish or grayisli band across rump germani (p. 355) 



fl^. Smaller; wing, lOG mm. or less; lower parts mottled with white; middle of 

 belly extensively white. 



6'. A wiiite band across the rump troglodytes (p. 355) 



6". Without white band on rump. 



c^. tapper tail-coverts margined with white marginata ( p. 356) 



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



.312. COLLOCALIA LOWI (Sharpe). 

 LOW'S SWIFTLET. 



' Cypselus loici Sharpe. Proc. Zool. Soc. ( 1879) , 333. 



CoUocalia low! Hartert. Cat. Birds Brit. Mus. (1892), 16, 498; Sharpe. 

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

 3, 75; Oberholser, Proc. Acad. Nat. Sci. Philad. (190(n, 58, 190. 



Salanyana loui McGregor and Worcester, Hand-List (190()), 58. 



Palawan {Everett, Whitehead, l^teere Exp.). Northern Borneo, Anamba Islands, 

 accidental in Sumatra and on Nias Island. 



Adult. — "Upper surface footy black with a little greenisli gloss, some- 

 what purplish on the tail ; lower surface brownish gray, with sonunvhat 



* 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. Xat. Sci. Philadelphia (190G). 58, 178. 



