340 DAVENPORT ACADEMY OF SCIENCES. 



not strictly either. The conspicuously Whitc-rumped form is not 

 the abundant bird near Keokuk, but does occur." 



I have examined two specimens in the Coe College collection, 

 taken by Dr. B. H. Bailey, one near Rockwell (Cerro Gordo 

 county), July 5, 1902, and one taken August 3, 1902, in Sac 

 county, which are typical migrans, with breast plain, and rump 

 not pale ; two others, one taken near Traer, June 20, 1902, and 

 one between Chapin and Rockwell, July 5, 1902, are more like 

 excubitoridcs, with breast faintly barred and rump paler. 



Dr. I. S. Trostler reports that he took a set of six eggs and 

 killed female bird May 16, 1897, in the south part of Pottawat- 

 tamie county. 



It is probable that the majority of the summer-resident Shrikes 

 in Iowa, particularly in the eastern portions of the state, belong 

 to the form migrans, but the form has been so recently elaborated 

 that the majority of observers have not differentiated it from the 

 excubitorides type. (See W. Palmer, "Northern Loggerhead 

 Shrike," Auk, xv, July, 1898, p. 248). 



Family VIREONID^. Vireos. 



The Vireos or Greenlets resemble "small, insectivorous 

 Shrikes." They feed upon small insects, which they diligently 

 gather from the surfaces of leaves, being most frequently hidden 

 in the leaves at the tips of branches. The nest is pensile, hung 

 between the forked branches of a small limb. All the species are 

 pleasing singers. 



Genus Vireo Vieillot. 



vSubgenus Vireosylva Bonaparte. 



281. (624). Vireo olivaceiis {IJn'^'i^-)- Red-eyed Vireo. 



The Red-eyed Vireo is a common summer resident in all parts 

 of the state from the first of May or latter part of April until 

 early in October, although it is more abundant as a migrant. 

 The nest is a pensile structure, hung from ten to thirty feet from 

 the ground, and the eggs are laid in the early part of June. The 

 Red-eyed Vireo is an incessant songster at all hours of the day, 

 and through the hottest days of summer its rambling, discursive 

 warble may be heard in woodlands. It is also found commonly 

 in shade trees on lawns and in orchards. 



