100 



48. D. virens Bel. BLACK-TIIUOATED GREEN WARBLER. Very 

 common migrant; May 5th to 25th, September 20th to October 12th. 

 A few remain to breed. 



49. D. pinus Bd. PINE-CREEPING WARBLER. Common migrant; 

 April 27th to May 20th, September 15th to October 5th. The first of 

 July, 1874, I found a large number of these birds with young just old 

 enough to follow their parents, in the "Pinery," and presume they 

 nest there regularly. 



60. D. palmarum Bd. YELLOW RED-POLL WARBLER. An abun- 

 dant migrant ; April 25th to May 20th, and September 10th to October 

 15th. 



61. D. discolor Bd. PRAIRIE WARBLER. A very rare spring and 

 summer visitant, perhaps breeding. But very few specimens have 

 been taken in the vicinity of Chicago. Dr. Hoy writes that he knows 

 of but one instance of its capture in Wisconsin. 



Genus Siurus Sic. 



52. S. aurocapillus Sw. GOLDEX-CROWXED WAGTAIL. An abun- 

 dant migrant; from May 5th to 20th, September 15th to October 20th. 

 Common resident in all suitable places. 



53. S. noveboracensis Nutt. WATER WAGTAIL. An abundant 

 migrant; April 1st to May 10th, and August 25th to October 25th. 

 Found anywhere in damp woods or along the banks of streams during 

 the migrations. A very few remain to breed in secluded woods. 



54. S. ludovicianus Bonap. LARGK-BILLED WATEU WAGTAIL. 

 Not an uncommon summer resident, arriving May 8th to 15th, and 

 leaving the first of September. Much more striking in its habits than 

 the preceding, and prefers dark woods or dense willow patches in wet 

 situations. 



Genus Oporornis Bd. 



55. O. agilis Bd. CONNECTICUT WARBLER. A rather common 

 migrant; May loth to 27th, and September first to October first. The 

 species occurs in about equal numbers in spring and fall. Near Wau- 

 kegan, the last of May, 1870, these birds were found frequenting a 

 dense swampy thicket on the border of a wood, in company witli Geo- 

 thlypis Philadelphia and two species of Siurns. They kept close to 

 the ground and were quite difficult to shoot, as they would dart into 

 the thicket upon the slightest alarm. Their habits In this locality 

 were so nearly like those of G. Philadelphia, that, until actually in 

 hand, it was not an easy matter to distinguish them. While confined 

 to the house by illness, the 26th and 27th of May, Mr. Jencks had the 

 pleasure of becoming still better acquainted with their habits. His 

 attention was first drawn to them by hearing a loud ringing song en- 



