WARBLERS. 79 



returning in September. It has been observed a few times by Mrs. 

 Stephenson at Helena between May 1 and 16, and I saw 2 at McGehee 

 May 17, 1910. 



[Bay-breasted Warbler. Dendroica caslanea. 



The baybreast is a rather uncommon but regular migrant in the Mississippi Valley, 

 and may be looked for in Arkansas in May and in September and October. It breeds 

 in Canada and the Northern States.] 



Black-poll Warbler. Dendroica striata. 



The blackpoll, although one of the most abundant warblers in the 

 northern and eastern States, is a rather uncommon migrant in the 

 lower Mississippi Valley. This is explained by a study of its migra- 

 tion route, which shows that most individuals of the species enter 

 the United States in spring by way of Florida and then pursue a 

 course across the middle and eastern States to their summer 

 home in the extreme northern United States, Canada, and Alaska. 

 The bird has been observed only a few times in Arkansas — once 

 by Mrs. Stephenson, at Helena, May 3, 1904, and twice by myself 

 at Turrell, May 7, 1910, and at Rich Mountain, May 26 and 27— 

 but it is doubtless rather more common than these few records 

 would indicate. It is one of the very latest migrants in spring, 

 passing north from May 1 to June 1. The southward movement is 

 chiefly during September and October. 



[Blackburnian Warbler. Dendroica fusca. 



This handsome warbler is a moderately common migrant in the Mississippi Valley, 

 and breeds from central Minnesota northward. It is found in Missouri from the last 

 of April to the last of May and in September and October, and may be looked for in 

 Arkansas at about the same dates.] 



Sycamore Warbler. Dendroica dominica albilora. 



This species is a rather uncommon summer resident, found chiefly 

 in the swamps and river bottoms of the eastern part of the State, 

 where it lives in the tall cypresses, sycamores, and other bottom-land 

 trees. It has been noted at Helena between April 10 and 21, but 

 doubtless arrives somewhat earlier than that, since it has been seen 

 at Hornersville, Mo., on March 21 (Widmann). In fall it has been 

 observed at Helena as late as October 10. Other records of its oc- 

 currence in the State are at Hardy, Lake City, and Walker Lake. 



Black- throated Green Warbler. Dendroica virens. 



. This warbler occurs as a common transient visitant in spring and 

 fall. It has been observed at Helena a number of times between 

 April 8 and May 16. I noted it at Lake City May 1 and at Walker 

 Lake May 4. Fall migration takes place in September and October. 

 In its summer home in the Northern States and Canada this bird 

 dwells mainly in pines, but in migration it may be found in both 

 evergreen and deciduous timber. 



