394 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
other, however, has a very faint rose tinge on the jugulum. Both have the pileum 
glossy slate-black, and the back slaty plumbeous. The single female collected has 
the back clear ochraceous-rufous and the pilenm slate-color, and, except that the 
pilenm is not quite so dark colored, agrees exactly with the La Palma (Costa Rica) 
specimen referred by me (see these Proceedings, vol. 5, p. 307), with doubt, to H. homo- 
chrous Scl. (P. Z. 8., 1859, p. 142). 
In examining the National Museum collection of these birds, which includes 16 
adult males and 13 females and young males (which seem to be much alike), I note 
great variations in plumage, affecting chiefly the color of the back, which varies from 
clear plumbeous-gray, in marked contrast with the glossy black of the pileum, to 
glossy black; and that of the lower parts, which varies from deep slaty gray, through 
intermediate shades, to nearly pure white. These variations do not seem to coincide 
with any definite geographical areas, however, and, remarkable though they appear, 
- I eannot, from this material, formulate characters by which two or more races may be 
trenchantly defined.—R. R.] 
Fam. TROCHILIDAS. 
*22. Trochilus colubris (Linn.). 
Apparently not common. One specimen. 
* 23. Chlorostilbon osberti Gould. 
Abundant. Especially along an isolated row of trees by the road- 
side, about one mile northeast of Moyogalpa. ‘Two specimens. 
Fam. CAPRIMULGIDZE. 
*24. Nyctidromus albicollis (Gm.). 
Abundant. Two specimens. | 
Fam. PICID 4. 
* 25. Centurus aurifrons hoffmanni (Cab. ). 
Abundant. Three specimens. 
Fam. ALCEDINIDA. 
26. Ceryle torquata (Linn.). 
Abundant. Four specimens 
*27. Ceryle alcyon (Linn.). 
Common. No specimens. 
29. Ceryle amazona (Lath.). 
Abundant. This elegant Kingfisher is by far the most numerous or 
of any on the island. 
The natives call it “ El Pescador” (“The Fisherman”), although this 
name is also applied to the other members of the family. Seven speci- 
mens. 
30. Ceryle americana cabanisi (Tschudi). 
Common. No specimens. 
