BULLETIN No. 32. 9 



1890, at Chance Creek, spent two weeks or more in Oberlin 

 village during the latter part of x\pril. Its song was one of 

 the conspicuous ones in the morning chorus during its stay. 

 None have 3'et been heard at Chance Creek, but I have no 

 doubt that they are nesting there. 



Lynds Jones, Oberlin, Ohio. 



A CORRECTION. 



I learn that it will be necessary to name a substitute for the 

 Alder Flycatcher of the horizon lists of Milton Township, Du- 

 Page County, Illinois, published in No. 28 of this Bulletin. 



Instead of the Alder Fh-catcher {Empidoiiax traillii alno- 

 rujn), it should be Traill's Flycatcher {Empidonax traillii). 



The nest and four eggs mentioned in the remarks of June 

 29th were afterwards taken, together with one of the birds, 

 the male, b}' the writer. The skin was forwarded later to Mr. 

 Walter Deane of Cambridge, Mass. , b)^ whose courtesy it was 

 placed in the hands of Mr. William Brewster for comparison. 

 Concerning this Flycatcher, Mr. Deane has written me under 

 date of April 9th, as follows : " Your bird is E. traillii. The 

 characters that separate alnorum from traillii, ' upper parts 

 richer and more olivaceous, the wing bands yellower and bill 

 decidedly smaller ' , are not borne out in your specimen. Typi- 

 cal traillii from further west has a larger bill than j'our bird, 

 while the bill of your bird is decidedly larger than alnorum.''' 

 Bver since the original naming of alnorum by Mr. Brewster, 

 the writer has entertained the idea, erroneous as it seems, that 

 the birds found here during the nesting season were of this 

 eastern form, and it is with pleasure that the present oppor- 

 tunity- is now offered for setting matters right. 



The foregoing facts also are of interest in showing that this 

 section of Illinois comes .some where upon the dividing ridge, 

 or over lapping line, between several eastern and western forms. 

 Interesting examples of these are our House Wrens and Water 

 Thrushes, which prove at times quite puzzling in their proper 

 disposition. 



Ben-j. T. Gault, Glen Ellyn, Illinois. 



