378 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
available for study. Both Ridgway’s specimens from Guadeloupe 
(Bull. 50, U. S. N. M., 1911, pt. 5, p. 706) and my series average 
slightly smaller than the Jamaican birds while the specimens from 
Dominica average larger. 
Ridgway (Loe. cit., p. 704) refers the Cuban bird to N. niger niger. 
The single specimen before me from Cuba, M. C. Z. 61113, is equally 
dark as the specimens from Jamaica and seems indistinguishable from 
them. It is included in the following table of measurements. 
Measurements in Maillimeters. 
Exposed 
IM. Ci Z. Locality Sex Wing Tail Culmen Tarsus 
61113 Cuba on 156 67.5 62D TRS 
20446 Jamaica o'(?) 15teS 66 11 
20447 < ou 162 63 6 11 
62034 a fof 154 67 6 1 
20448 < ot 153-0 60 te) 1 
21445 c 2 151 60 6 TRS 
13615 Dominica fof 155 67 6 RS 
66334 Guadeloupe fof 147.5 59 5.5 11 
66333 ‘ rot 149 62.5 6 11 
13615 Z Q 149 62.5 5.5 lat 
The Black Swift is especially abundant on the edges of the “ Grand 
Bois.” It was observed at nearly every locality visited except the 
flat land of Grande Terre. The bird is called L’hirondelle de Mon- 
tagne by the natives because it appears just before sunset flying in 
great flocks from the mountains. I found it to be wholly an early 
morning and late afternoon flier. None of my guides knew anything 
of its breeding habits. But since the bird always comes from and 
retreats to the deep rain forest it is not improbable that it may roost 
in some of the big hollow trees on the mountain slopes. 
23. CHAETURA AcuTA (Gmelin). 
Petit Martinet Noir. Hirondelle-Mouche. 
Eleven specimens of both sexes from Goyave, August 29th and 30th. 
The Lesser Antillean Swift was observed at only a few localities, 
first on July 4th at Ste. Claude flying with a number of Black 
