326 OHIO EXPERIMENT STATION". 



of most regular occurrence in the thickets bordering woodlands and in the under- 

 growth of the forests. 



149. Dendroica caerulea (WILS.). 

 Cerulean Warbler. 



Rare ; probably occurring solely as a transient visitor. It was noted only in 1891, 

 when on May 8 an adult male was shot and two other individuals were seen. 

 Another was observed on May 10, and one also on May 15. These were all ap- 

 parently in full song, and had not this been the case, would have passed unnoticed 

 amid the multitudes of migrant Warblers which at this season throng the tops of 

 the forest trees in the valley of the Killbuck. 



150. Dendroica pensylvanica (LINN.). 

 Chestnut-sided Warbler. 



A tolerably common transient from May 14 to May 20. It is also a very rare 

 summer resident, but has not been observed in the fall. The only summer records 

 are for 1893, in which year one of these birds was, on July 9, seen singing in the 

 woodland of the Killbuck Valley, at a locality about four miles northwest of Woos- 

 ter. On July 10 and 16 of the same year, a Chestnut-sided Warbler, quite probably 

 the former individual, was again heard in the same vicinity. 



The species frequents almost exclusively the woodlands, moving among the 

 branches of the highest trees, and also, though apparently less preferably, in the low 

 undergrowth. 



151. Dendroica castanea (WILS.). 

 Bay-breasted Warbler. 



A very rare transient visitor. The only dates for this species are May 22 and 24, 

 1692. The birds seen were in rather open woodland, in the lower portions of the 

 trees, and were without difficulty closely approached. 



Although Wheaton mentions 1 this species as occurring "in great numbers" in 

 fall, the writer has strangely enough failed to detect it during that season. Many 

 Black-poll Warblers have been shot in the hope of securing specimens of D. castanea, 

 as the latter might of course, if not captured, readily pass for D. striata. 



152 Dendroica striata (FORST.). 

 Black-poll Warbler. 



An abundant fall transient, but seen during the spring season only in 1892, when 

 it was common from May 21 to May 30. In the autumn it has been observed from 

 September 18 to October 16. It may be found almost wherever there are trees or 

 bushes, and in the streets of the towns is, of a.ll the transient Warblers, the one most 

 frequently occurring, and the species most numerously represented. It is seen occa- 

 sionally in small straggling companies, consisting, however, of rarely more than six 

 or seven individuals. 



Geological Survey of Ohio 1 V , 1 



p 2 



