100 



48. D. virens Bd. Bl.\ck-tiii;oati:d Grekn Warblkr. Very 

 common mignuit; May 5lh to 25tli, September 20th to October 12tli. 

 A few remain to breed. 



49. D. pinus i>(L Pixe-creicping Warbler. Common migrant; 

 April 27lli to May 20tli, September 15tli to October otli. Tlie first of 

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

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

 nest there regularly. 



50. D. palrtiarum Bd. Yellow Red-poll Warbler. An abun- 

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

 15th. 



51. D. discolor Bd. Praume Warbler. A very rare spring and 

 summer visitant, perhaps breeding. But very few specimens have 

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

 of but one instance of its capture in Wisconsin. 



Genus Siurus Sw. 



52. S. auroeapillus 5'io. Goluex-crowxed Wagtail. An abun- 

 dant migrant; from May 5th to 20tli, 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. Large-billed Water 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 Avillow patches in wet 

 situations. 



Genus Oporornis Bd. 



55. O. agilis Bd. Coxxecticut Warbler. A rather common 

 migrant; May»15th 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, 187(5, tiiese birds were found frequenting a 

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

 thhjj^is 2:>hVadclphia and two species of Siarus. They kept close to 

 the ground and were quite diflicult 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 2Gth and 27tli of May, Mr. Jencks had the 

 pleasure of becoming still better acquainted with their habits. His 

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



