52 Bulletin 1, Biological Society of Washington, 1918. 



Cooke, W. W. 



Bird Migration in the District of Columbia. 



First Ed. Proc. BioL Soc. Wash., Vol. XXI, pp. 107-118, April 11, 

 1908. 



Second Ed. Proc. Biol. Soc. Wash., Vol. XXVI, pp. 21-26, Feb. 7, 

 1913. 



These two publications give detailed information on the migra- 

 tion season of birds in the District and surrounding region, and 

 bring the records of species observed up to date. 



The total number of forms listed is 294 of which 1 is extinct, 2 

 are hybrids and 6 are subspecies of species otherwise represented, 

 leaving 285 living species known to occur in the vicinity of the 

 District. One extinct bird, the Carolina Paroquet, and 1 living 

 species, the American wigeon, listed by Richmond, were inadver- 

 tently omitted. 



MAMMALS. 



The mammals that maintain existence in thickly popu- 

 lated areas are small, inconspicuous and elusive. The larger 

 forms that are compelled to live more or less in the open 

 disappear. Among those which have inhabited the vicinity 

 of the District of Columbia within historic times, but which 

 are now locally extirpated, are buffalo, elk, white-tailed deer, 

 wild-cat, puma, gray wolf, black bear, pine marten, beaver 

 and black rat. The last-named species was introduced from 

 the Old World, but disappeared before its later imported 

 congener and rival, the brown rat. Buffalo disappeared 

 from Virginia and therefore from this vicinity soon after 

 the establishment of the first permanent settlements, but 

 gray wolves were present and destructive as late as 1728. 

 This is proved by the fact that in that year a law was 

 passed placing a bounty of 200 pounds of tobacco upon each 

 wolf scalp. Elk persisted in Virginia until 1844. 



Forty-one species of mammals are now known to live in 

 the neighborhood of the city of Washington, of which three 

 were described as new to science as late as 1910 to 1913. 

 Two of these species are shrews, one of which is called 

 Microsorex winnemana, and the third species is a bat named 

 My otis winnemana. The specific name winnemana means 



