KEYES AND WILLIAMS BIRDS OF IOWA. 151 



The male was not as brave, but kept at a safe distance, yet appearing 

 very solicitous and restless while the nest was being disturbed. 



[B 250, R 141, C 177, U 629.] 

 Vireo soliiarius (Wils.). Blue-headed Yireo. Migratory; common. 

 Arrives the first week in May, and passes southward the first of Septem- 

 ber. During the migratory periods it associates with various warblers 

 and several species of its own genus. 



Subgenus YIREO Vieillot. 

 [B 248, R 143, C 1S1, U 631.] 



Vireo noveboracensis (Gmel.). White-eyed Vireo. Rare. Prof. 

 H. W. Parker writes that he has taken it at Grinnell. 

 [B 246, R 145, C 1 S3, U 633.] 



Vireo bellii Aud. Bell's Vireo. Summer resident; common. "This 

 is, perhaps, the most familiar summer resident of the genus. No 

 other woodland bird appears to be so completely satisfied with so 

 narrowly restricted a vertical range as this retiring and unobtrusive little 

 greenlet. Though for the most part unseen, its voluble little melody, 

 earnest and plaintive, ever betrays its presence in every hazel copse 

 and garden. Its neat, pensile nest is suspended from the branchlet of 

 some low bush, and here its eggs, four or five in number, are deposited 

 the last week in May. One nest containing four eggs was found in a 

 small bush situated within eight feet of a railroad track over which cars 

 were passing continually, and, notwithstanding the violent swaying of 

 the bush caused by the strong currents of air created by each rapidly- 

 moving train, the young birds were successfully reared." * 



Family MNIOTILTID^. Wood-wakblers. 

 Genus MNIOTILTA Vieillot. 

 [B 167, R 74, 74 0, C 91, 92, U 636.] 

 Mniotilta varia (Linn.). Black and White Warbler. Migratory; 

 cmite common; often arriving about the middle of April, and sojourn- 

 ing until the middle of May. In the fall it appears from the first to the 

 third week in September. At Des Moines this species has been ob- 

 served in June and July, and consequently may be regarded as a sum- 

 mer resident, though not a common one. 



Genus PROTONOTARIA Baird. 



[B 169, R 75, C 95, U 637.I 

 Protonotaria citrea (Bodd.). Prothonotary Warbler. Summer res- 

 ident; not uncommon, especially in the eastern part of the State. 

 Arrives during the last week in April. 



* C. R. Keyes, Iowa Greenlets. Ornithologist and Oologist, Vol. XIII., p. 44. 



