124 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
B. 49. The published writings of Philip Lutley Sclater, 1844-1896. 
Prepared under the direction of G. Brown Goode. 
8vo., 1896, pp. xix, 1-135, frontispiece. 
B. 50. The birds of North and Middle America: A descriptive cata- 
logue of the higher groups, genera, species, and subspecies 
of birds known to occur in North America, from the Arctic 
lands to the Isthmus of Panama, the West Indies and other 
islands of the Caribbean Sea, and the Galapagos Archipelago. 
By Robert Ridgway, curator, division of birds. Part L 
Family Fringillide—The Finches. 
8vo., 1901, pp. i-xxx, 1-715, 20 pls. (Additional parts in preparation.) 
