KEYES AND WILLIAMS BIRDS OF IOWA. 155 



sexes, appear and proceed leisurely along the water-courses, in com- 

 pany with D. coronata and others. 



Genus SEIURUS Swainson. 



[B 186, R 115, C 135, U 674.] 

 Seiurus aurocapillis (Linn.). Oven Bird. Summer resident ; com- 

 mon; arriving about the first of May, and remaining until the middle 

 of September. Breeds about the third week in May, in hilly wood- 

 land, where, at this season of the year it seldom fails to attract notice 

 by its loud, impetuous cries. The nest is commonly placed in a slight 

 depression in the ground and is arched over, the entrance being at the 

 side. Even thus hidden from observation, it does not escape the keen 

 eyes of the cow-bird, which often deposits its eggs in the nest of this 



species. 



[B 187, part, R 116, C 136, U 675.] 



Seiurus noveboracensis (Gmel.). Water-thrush. Summer resident; 



not common. Arrives early in May. Usually observed in dark, 



marshy woodlands. A few miles north of Des Moines, a female of this 



species was taken in June, 1884; it was feeding young just from the 



nest. 



[B 188, R 117, C 138, U 676.] 



Seiurus motacilla (Vieill.). Louisiana Water-thrush. Migratory; 

 common ; arriving about the middle of April, and passing southward in 

 September. When it arrives in the spring it is noticed about the pools 

 and creeks in low woodland, where it walks about the edge of the 

 water in search of food, and looking, at casual sight, like a little spotted 

 sandpiper, but when startled, flies to some tree near by, and goes 

 through those evolutions of the tail which are characteristic of the wag- 

 tails. A few remain through the summer, and breed. 



Genus GEOTHLYPIS Cabanis. 

 Subgenus GEOTHLYPIS Cabanis. 



[B 1 7 j, R 120, C 1 4 2, U 679. I 

 Geothlypis Philadelphia (Wils.). Mourning Warbler. Migratory; 

 rather common in the underbrush and willows on the low lands along 

 the streams. Sojourns in spring until the third week in May. 



[B 170. part, R 122, part, C 141, part, U, 681 a. \ 



Geothlypis trichas occidentalis Brewst. Western Yellow-throat. 

 Summer resident; common. Arrives the last of April and remains un- 

 til September. Haunts similar to those of G. Philadelphia ; and also 

 hedges and shrubbery. 



