THE NATURAL HISTORY SURVEY. I9I 



The range of this Kinglet includes the whole of North Amer- 

 ica, from the Arctic coast southward through the United States, 

 and in winter south to Guatemala. It breeds chiefly north of the 

 United States and also in the Rocky Mountains, the Sierra 

 Nevada, and the mountains of Arizona. 



Genus POLIOPTILA Selater, 1855. 



Polioptila cserulea (Linnaeus). Blue-gray Gnatcatcher. 



Motacilla cwrulea Linnaeus, S. N., ed. 12, I, 1766, 337. 

 Sylvania coerulea Nuttall, Man., ed. 2, I, 1840, 337. 

 Polioptila cwrulea Soiateb, Proc. Zool. Soc, London, 1855, 11. 

 Popular synonyms : Easteen Gnatcatchee. Blue When. Lono- 

 TAiLED Ween. 



The Blue-gray Gnatcatcher is a not uncommon migrant, ar- 

 riving, in the spring, from the last of April to the last of May, 

 and returning, in the fall, from the twentieth of August to the 

 , middle of September. It is also a rare resident. Mr. B. T. Gault 

 informs me that it has been found breeding in the Addison 

 Woods, DuPage County, Illinois. Mr. Amos W. Butler, in his 

 Birds of Indiana, states on the authority of Mr. C. A. Tallman 

 and Mr. Eliot Blackwelder, that it breeds in Cook County, Illi- 

 nois. The lack of heavy timber within our limits is probably the 

 reason that this species does not breed more extensively in our 

 vicinity. 



The range of the Blue-gray Gnatcatcher covers the United 

 States east of Nebraska and western Texas and chiefly south of 

 Latitude 43°. It breeds in suitable localities quite throughout its 

 range, and migrates southward, in winter, as far as the West 

 Indies and Guatemala. It has also been reported as far north 

 as Ontario. 



FAMILY TURDID^: THRUSHES, BLUEBIRDS, ETC. 

 Genus HYLOCIOHLA Baird, 1864. 



Hylocichla mustelina (Gmelin). Wood Thmsli. 



Turdms mustelinus Gmelin, S. N., I, ii, 1788, 817. 



Hylocichla mustelina Ridgwat, Proc. U. S. Nat. Mus., Ill, August 



27, 1880, 186. 

 Popular synonyms: Wood Robin. Bell Theush. Bell Bibd. 



This beautiful bird and sweet songster is a common summer 

 resident, arriving, in the spring, the last of April and departing, 

 in the fall, early in September. Because of its favorite haunts 



