670 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



This species somewhat resembles the Mourning Warbler, but the 

 eye ring should distinguish it. 



Length, 5.45; wing, 2.90; tail, 2.15; bill, .42. 



The Connecticut Warbler is a not uncommon migrant in spring 

 and fall in Illinois and Wisconsin, and according to Kumlien and Hoi- 

 lister a few breed in the latter state ; although the majority go farther 

 north. They say: "In Jefferson County a pair was found, June 16, 

 1874 (L. K.), putting the finishing touches upon their nest. It was 

 placed on the ground in a dense thicket of hazel, briars, etc. Though 

 the nest was not touched they abandoned it, but bred in the same 

 thicket; the nest, however, could never be found. Has been found 

 in the dense tamarack swamps of Jefferson County in July, on several 

 occasions when it was, without question, nesting, and we have no 

 doubt that a considerable number nest within the state. It is the 

 very last warbler to pass northward in the spring. Many observers 

 fail to find this species. Mr. Clark has not, as yet, taken it in Dunn 

 County, and it was not found in the state by King, Grundtvig, or 

 Willard." (Birds of Wisconsin, 1903, p. 117.) 



331. Oporornis Philadelphia (WiLS.). 

 MOURNING W T ARBLER. 



Geothlypis Philadelphia (Wils.), A. O. U. Check List, 1895, p. 283. 

 Distr.: Eastern United States and southern British Provinces, 

 west to Manitoba, the Dakotas, and Kansas; breeds from Penn- 

 sylvania, New York, northern Michigan, and northern Wisconsin 

 northward; south in winter to Central America and northern South 

 America. 



Adult male in summer: Head and sides of neck, ash-gray; throat, 

 grayish, mixed with black, shading into black on the breast (in full 



breeding plumage the whole throat 

 and breast, black) ; no white eye ring; 

 rest of upper parts, clear olive green; 

 under parts (except throat and 

 breast), yellow; wings, slaty brown, 

 edged with olive ; tail strongly washed 

 wth olive; no white on wings or tail. 

 Adult male in fall: Similar, but 

 black feathers on throat and breast 

 edged with gray. 

 Adult female in summer: Similar to adult male, but throat and 

 breast gray, palest on chin. 



