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., 18%, 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 I. 

 Family Fringillida? The Finches. 



8vo., 1901, pp. i-xxx, 1-715, 20 pis. (Additional parts in preparation.) 



