278 Natural History Bulletin. 



ceous brown, obscurely streaked with black; below white, 

 thickly streaked with black, with an indistinct wash of buffy 

 across the breast. Youngest specimens almost clear olive 

 brown above, light olive or buffy brown below; crissum yel- 

 low. At a little later stage the yellow patches on sides of 

 breast are indicated by a brightening of the buffy brown in 

 these regions. 



Breeds within the Arctic Circle. (MacFarlane.) 



Six specimens secured. 



Dendroica maculosa (Gmel.). Magnolia Warbler. 

 Abundant at Chemawawin. Six specimens secured. 



Dendroica striata (Forst.). Blach-foll Warbler. One 

 specimen, male, secured at Grand Rapids. 



Seiurus noveboracensis (Gmel.). Water Thrush. Two 

 specimens from Chemawawin agree more nearly with this 

 species than with S. noveboracensis notabilis. 



Geothlypis s^? The single specimen (male) secured is 

 a striking combination in color characters of G. macgillivrayii 

 and G. -philadelfhia^ having the white spots on eyelids and 

 black lores of the former, and the black chest and throat of 

 the latter. The white spots on the eyelids are composed of 

 about three minute perfectly white feathers. 



Measurements: Length 5 inches; wing 2.50; tail 2.10; 

 tarsus .85; thus agreeing with G. macgillivrayii. Mr. Ridg- 

 way, to whom I gave a verbal description of this bird, is 

 inclined to pronounce it a hybrid. This is, perhaps, the more 

 probable supposition; but it might possibly be a specimen of 

 the original species from which both the present species took 

 their origin. 



The hybrid question is a most important and interesting 

 one, and it is to be hoped that some one with abundant mater- 

 ial at command, e. g. Mr. Ridgway himself, will attack it in 

 earnest. 



