th;e natural history survey. 173 



records of its appearance in our vicinity are the following. Dr. 

 Joseph L. Hancock saysif "I secured a female of Oporornis 

 (Geothlypis) formosa one-half mile southeast of Grand Crossing, 

 among the undergrowth in a small isolated patch of woods. The 

 finding of this species in that locality is an event of unusual in- 

 terest. A specimen has been reported to me by my friend Mr. 

 H. K. Coale, of Chicago, as found by Mr. R. B. Trouslot at 

 Piano, Illinois, a few years ago." Mr. George Clingman took a 

 specimen at Bryn Mawr, Chicago, during the first week in May, 

 1892. 



As the Kentucky Warbler is an abundant species in southern 

 Illinois, it is quite possible that it may appear at times as a strag- 

 gling summer visitant within our limits and the field students of 

 ornithology should watch for it in the woodlands of our area. 



The range of the Kentucky Warbler extends through the 

 United States, east of the Great Plains and from southern New 

 England, southern Michigan, southern Wisconsin, Iowa and eastr 

 ern Nebraska southward to the Gulf of Mexico and, in winter, 

 through Mexico and Central America to Colombia. It is also 

 a casual winter visitor to Cuba and other islands of the West In- 

 dies. It breeds nearly throughout its United States range. 



Oporornis agilis (Wilson). Connecticut Warbler. 



Sylvia agilis Wilson, Amer. Orn., V, 1812, 64, pi. 39, fig. 4. 

 Triehas agilis NuTTAii, Man., ed. 2, I, 1840, 463. 

 Trichas tephrocotis Nuttall, Man., ed. 2, I, 1840, 462. 

 Oporornis agilis Baibd, Rep. Pacific R. R. Surv., IX, 1858, 246. 

 Geothlypis agilis Geegg, Proe. Elmira Acad. Sci., 1870, (reprint, p. 7). 

 Popular synonym : Geat-hea.ded Wakblek. 



The Connecticut Warbler is a not uncommon migrant, arriv- 

 ing in the spring from the middle of May to the first week in 

 June, and returning in the fall from about the middle of August 

 to the last of September. This species, like the Mourning War- 

 bler, is not generally thought to be even a frequent visitor to our 

 vicinity, for it is a shy bird and is seldom found away from bushy 

 swamps and heavy underbrush and is, therefore, easily over- 

 looked. 



The range of the Connecticut Warbler extends through east- 

 ern North America, breeding chiefly north of the United States 

 and west of Ontario. In the spring, it migrates chiefly through 

 the Mississippi Valley, but in the fall probably the larger number 



+Auk, Vol. V, April, 1888, 210. 



