234 Trans. Acad. Sci. of St. Louis. 



ing from mountains of West Virginia, northern New England, 

 Michigan, Wisconsin northward. The subspecies, notabiUs, 

 ranges throughout western North America from Indiana and 

 lUinois (more rarely eastward) to the Pacific, north into British 

 Columbia and along the Rocky Mountains to Alaska and East 

 Cape in Siberia. It breeds from Minnesota, western Nebraska 

 and the more northern Rocky Mountains of the United States 

 northward. In winter both subspecies go to the West Indies 

 (chiefly the eastern form), Mexico, Central America, Panama, 

 Colombia, Venezuela and British Guiana (both forms together). 

 Water thrushes which winter in southern Florida are said to be- 

 long to the western subspecies, but there is so much difficulty 

 in separating the two forms, that it has not yet been possible 

 to trace their migration routes from summer to winter homes. 

 Eastern Missouri seems to be the region where these migration 

 routes overlap, as we see birds both with white and decidedly 

 yellow underparts. It will therefore be well for collectors to 

 pay special attention to distinguish between the two forms in 

 order to find out in what proportion they occur; it is generally 

 accepted that the Water Thrushes of Missouri belong to the 

 western form, notahilis. Water Thrushes are common and regu- 

 lar transient visitants in all parts of Missouri, but most common 

 eastward, less so westward, where Audubon found them May 

 4, 1843, at Leavenworth and May 7, 1843, at St. Joseph. It 

 is also reported by Mr. Tindall from Independence, May 15, 

 1899, and by W. E. D. Scott from Warrensburg, where it was 

 quite common and first noted during the first week in May, 1874. 

 In Taney Co. the writer found it common and in song along 

 White River, May 7 to 10, 1906. Mr. E. S. Woodruff found it 

 common in Shannon Co., May 9, 1907. In the vicinity of St. 

 Louis the "firsts" appear with great regularity between April 

 24 and 28, exceptionally a few days earher (April 21, 1883). 

 The bulk is present from May 5 to 12 and the last are seen in 

 the third week of May from the 15 to the 22, exceptionally 

 later (May 31, 1897). There is very little difference between 

 St. Louis dates and those collected by Mr. Currier at Keokuk, 

 where it is an abundant migrant, arriving between April 20, 

 1896, and May 6, 1892, but mostly about April 30, with the last 

 dates. May 11, 1897, and May 12, 1893. Its frequent song greatly 

 facilitates identification, since it is entirely different from that 

 of the Louisiana Water Thrush, in the haunts of which it often 

 dwells while with us in spring migration, and with which it 



