230 Trans. Acad. Sci. of St. Louis. 



the hilltops as well as the sycamores in the bottoms. In the 

 southeast its nests are built in cypress trees (Taxodium). Near 

 the southern boundary its arrival has been noted as early as 

 March 21, 1894, when males were already in full song near Hor- 

 nersville. In Shannon Co., Mr. Woodruff heard it for the first 

 time March 28, 1907. In the vicinity of St. Louis the appear- 

 ance of the first singing males varies according to the weather 

 from April 4 to 13, but by the 25th they are always in full 

 numbers and conspicuous songsters. About the first of September 

 they begin to wander about and old and young are met with in 

 places not usually visited. Dates of "lasts" vary greatly from 

 September 2, 1887, to October 11, 1885, the latest for St. Louis. 



6G7. Dexdroica virens (Gmel.). Black-throated Green War- 

 bler. 



Sylvia virens. Sylvicola virens. 



Geog. Dist. — Eastern North America, north to Newfoundland, 

 islands of Gulf of St. Lawrence, southern shores of Hudson Bay, 

 southwestern Athabasca and northern Alberta; west to the 

 Plains. Breeds from the higher mountains in South Carolina, 

 southern New England, northern New York, Michigan, Wis- 

 consin, Minnesota northward. Winters from Mexico to Panama. 



In Missouri one of our commonest and most generally distrib- 

 uted transient visitants in spring and fall, less common in the 

 north-western portion of the state and the prairie region gener- 

 ally. Dr. Hoy listed it among his birds of western Missouri 

 and W. E. D. Scott found it May 7, 1874, at Warrcnsburg. 

 Mr. H. NehrHng reports it from Pierce City, May 2, 1884, and 

 Mr. W. Savage from Jasper, May 1, 1903. In the southeastern 

 corner of Missouri the writer found it as early as April 16, 1898, 

 but at St. Louis the firsts are noted between April 26 and May 

 1. In Shannon Co. where Mr. Savage found it to be tolerably 

 common, the first was seen at Monteer, April 24, 1904; at Keo- 

 kuk, April 30, 1895, is the earliest date reported by Mr. Currier. 

 At St. Louis the bulk is present from between May 5 to 13 and 

 the last has left before May 20 (May 22, 1907). The last at 

 Monteer is May 10, 1904, in Carter Co., May 17, 1907, and at 

 Keokuk, May 24, 1895. W. E. D. Scott found it as late as the 

 middle of June, 1874, suggesting the possibility of breeding. 

 Fall migration begins in the latter part of August and lasts 

 through September to the second week of October at St. Louis 



