PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 375 
the fact that it never seemed to associate with any other member of its 
family, although all the other common species seemed to mix indis- 
criminately. This latter fact may, however, be due to a community of 
interests. 
The peculiar scissor-like motion of the long tail-feathers, from which 
this bird derives its vernacular name, is always seen during a flight of 
any length. 
All the specimens obtained were shot from trees bordering the shore 
of the bay, and they do not seem to penetrate into the forest to any 
great extent. Five specimens. 
17. Milvulus tyrannus (Linn.). 
One day while collecting up the river a bird flew over which I took to 
be this species, principally from the fact that there was no motion of 
the tail-feathers. 
Fam. DENDROCOLAPTIDA. 
*18. Dendrornis eburneirostris (Less. ). 
One specimen shot near the river. Noticed a marked absence of 
birds of this family, although the woods in many places seemed well 
suited to their pursuits. 
Fam. TROCHILIDA. 
*19. Chlorostilbon osberti Gould. 
One specimen. 
Fam. CAPRIMULGIDA. 
*20. Antrostomus carolinensis (Gm.). 
Common. Two specimens secured. 
*21. Nyctidromus albicollis (Gm.). 
Seen, but not secured. 
Fam. PICIDA. 
*22. Centurus aurifrons hoffmanni (Cab.). 
Abundant. The common Woodpecker of the region. 
23. Ceryle torquata (Linn.). 
Common, especially in the swampy country across the river. Noisy 
and active, like all its American relatives. One specimen. 
*24. Ceryle alcyon (Linn.). 
Not common. The only one that I saw was shot in the swamp men- 
tioned above. 
25. Ceryle americana cabanisi (Tschudi). 
Common along the river. 
