198 
THE CONDOR 
Vol. XXII 
the combination produced is a happy one, but believes that it will at least en- 
able others to determine what birds he has seen. 
Micropus 
Micropus 
Micropus 
melba (Linnzus) 
aequatorialis (Muller) 
apus (Linnzus) 
Collocalia 
Collocalia 
innominata Hume 
ocista Oberholser 
Collocalia fuciphaga fuciphaga 
Micropus pacificus (Latham) (Thunberg ) 
Micropus horus (Heuglin) Collocalia fuciphaga vanikorensis 
Micropus affinis (J. E. Gray) (Quoy and Gaimard) 
Micropus subfurcatus (Blyth) Collocalia fuciphaga amelis Oberhol- 
Micropus andicola (Lafresnaye and ser 
D’Orbigny ) Collocalia fuciphaga wunicolor (Jer- 
Micropus myoptilus (Salvadori) don ) 
Aeronautes melanoleucus (Baird) Collocalia vestita vestita (Lesson) 
Panyptila sanctihieronymi Salvin 
Panyuptila cayanensis (Gmelin) 
Tachynautes parvus (Lichtenstein ) 
Tachornis infumatus (Sclater) 
Collocalia 
Collocalia 
Collocalia 
Collocalia 
vestita mearnsi Oberholser 
vestita elaphra Oberholser 
vestita aenigma Riley 
origenis Oberholser 
Tachornis phoenicobius Gosse Collocalia lowi lowi (Sharpe) 
Hirundapus celebensis (Sclater ) Collocalia low: palawanensis Strese- 
Hirundapus caudacutus (Latham ) man 
Hirundapus giganteus (Temminck) Collocalia inopina Thayer and Bangs 
Mearnsia picina (Tweeddale) Collocalia thespesia Oberholser 
Streptoprocne zonaris (Shaw) 
Streptoprocne semicollaris (Saussure) 
Nephoecetes niger (Gmelin) 
Collocalia francica townsendi Ober- 
holser 
Collocalia francica inexpectata Hume 
Cypseloides brunneitorques (Lafres- 
naye) 
Cypseloides cherriei Ridgway 
Chaetura 
pelagica (Linnaeus) 
Collocalia 
Collocalia 
Collocalia 
Collocalia 
francica germani Oustalet 
troglodytes G. R. Gray 
marginata Salvadori 
linchi affinis Beavan 
Chaetura vauxri (Townsend) Collocalia linchi elachyptera Oberhol- 
Chaetura richmondi Ridgway ser 
Chaetura gaumeri Lawrence — Collocalia linchi isonota Oberholser 
Chaetura acuta (Gmelin) Collocalia linchi oberholseri Strese- 
Chaetura poliura (Temminck) man 
Chaetura cinereiventris Sclater Collocalia dodgei Richmond 
Chaetura stictilaema (Reichenow) Collocalia esculenta (Linnaeus) 
Chaetura leucopygialis (Blyth) Collocalia bartschi Mearns 
The wing claw in the Micropodidae is placed near the tip of the thumb or 
pollex and is concealed beneath the feathers that form a sharp anterior margin 
on the wing at that point. The large series of birds studied were examined 
under a binocular dissecting microscope with a magnification of eight diame- 
ters. The use of this instrument left both hands free to manipulate the bird, a 
necessary arrangement, as the claw is small and at times difficult to locate 
among the feathers. The claw in general is blackish or dusky in color, and is 
comparatively long, with the tip recurved in a slight hook. It is attached 
rather loosely and may be removed easily, but where a claw has been broken 
away, its former location is plainly indicated by a scar. The form of the claw 
varies to some extent, and in abnormal individuals it may degenerate into a 
short knob with slight projection. 
In all of the swifts examined wing claws were normally developed save in 
one group of species belonging to the genus Collocalia. In the various subspe- 
cles of C. linchi the wing claw was normal in some eases, rudimentary in oth- 
ers, and occasionally was absent on one or both wings. The same was true in a 
