ascertained to occur in Illinois. 369 



*i^. D. discolor (Vie ill.)- Prairie Warbler. Summer sojourner; 

 entire state ? 



50. D. 2)almarrim (Gmel.). Red-poll "Warbler. Transient. 



Group Geothlype^. The Ground Warblers. 

 Genus Seiurus, Swainson. 

 Subgenus Seiurus. 

 *51. S. aurocapillus (Linn.). Golden-crowned Thrush; "Oven 

 Bird." Summer sojourner. 



*?52. S. Novehoracensis (Aud.). Small-billed Water Thrush, or 

 " Water Wagtail." Transient ; sometimes winter sojourner south of lati- 

 tude 39°. 



*53. 8. Ludovicianus (Grael.). Large-billed Water Thrush, or "Water 

 Wagtail." Summer sojourner. Entire state, but most abundant south- 

 ward. 



Subgenus Oporornis, Baird. 



*54. 8. forniostts (W ils.). Kentucky Warbler. Summer sojourner. 

 Entire state ; very abundant north to 39°. 



55. 8. agilis (Wils.). Connecticut Warbler. Transient; most 

 abundant in spring. 



*56. 8. Philadelphia (Wils.). Mourning Warbler. Summer so- 

 journer. Breeding in extreme southern portion ? 



Subgenus Geothlypis, Cabanis. 



* 57. 8. trichas (Linn.). Maryland Yellow-throat. Summer sojourner. 



Group IcTERiiE. The Chat Warblers. 

 Genus Icteria, Vieillot. 



* 58. I. virens (Linn.). Yellow-breasted Chat; "Yellow Mocking 

 Bird." Summer sojourner. 



Group Setophag^. The Flycatching Warblers. 

 Genus Myiodioctus, Audubon. 



* 69. 3f. mitratus (G m e 1 .). Hooded Warbler. Summer sojourner. 



60. M. pusillus (W i 1 s .). Black-capped Greeu-and-Yellow Warbler. 

 Transient. 



61. 31. Canadensis (Linn.). Canada Flycatching Warbler. Tran- 

 sient ; breeding in northern part of State ? 



Genus Setojjhaga, Swainson. 



*62. 8.ruticilla (Linn.). Red-start; Black-and-Red Flycatching War- 

 bler. Summer sojourner. 



