828 OHIO EXPERIMENT STATION. 



noted in swamps in other portions of the Killbuck Valley, but no other spot 

 seems to be quite so congenial as the one above mentioned. 



This Warbler arrives usually late in April, the twenty-first of the month (1891) 

 being the earliest date recorded. It has not been observed later than July 28 (1892). 

 It is generally in full song at the time of its spring appearance, and for a season its 

 notes form one of the characteristic bird melodies of its favorite haunts. 



GENUS GEOTHLYPIS CABANIS. 



SUBGENUS OPORORNIS BAIRD. 



157. Geothlypis agilis (WILS.). 

 Connecticut Warbler. 



A very rare transient visitor. The only record is a single specimen taken'Octo- 

 ber 2, 1892. 



SUBGENUS GEOTHLYPIS CABANIS. 



158. Geothlypis Philadelphia (WILS.). 

 Mourning Warbler. 



Apparently a very rare transient visitor. It has been positively identified but 

 once, on May 14, 1893, when a single adult male was found in the thick undergrowth 

 of the woodland along Killbuck Creek, about four miles northwest of Wooster. 



159. Geothlypis trichas (LINN.). 

 Maryland Yellow-throat. 



An abundant summer resident. The dates of its appearance range from April 

 23 to May 7, and it is present generally until the first of October, although less numer- 

 ous during September. Dr. Wheaton 1 writing probably with regard to the vicinity 

 of Columbus, says that this species "remains until the first of September." 



It is more common on the bottoms than on the uplands, and though of course a 

 bird of thickets and fencerows, it sometimes wanders away from both. On July 2, 

 1891, a Maryland Yellow-throat was heard singing in the midst of a large wheat-field, 

 where there seemed nothing to attract it from the presumably more suitable locali- 

 ties in the neighborhood. 



The song of this species continues throughout the whole of the bird's summer 

 sojourn, but is more irregular during September and the latter part of August. The 

 date of latest song heard (October 2, 1892,) is coincident with the latest record for 

 the species. In spring it is one of the early morning singers, being often among the 

 first species heard. On May 27, 1890, it was singing at 3 135 A. M. 



^Geological Survey of Ohio IV, 1882, p. 275. 



