Nest Life of the Catbird 167 



Arthur F. Smith for the first two days of the nestling period 

 at the end of which time the young died. The second Oko- 

 boji nest was under almost continuous observation from the 

 time the first egg hatched until a terrific rain storm destroyed 

 the last of the young ten days later. The nest studied by 

 Smith will be referred to as nest B, and the other one, as 

 nest C in this report. 



During the Sioux City work, Mr. Howard Graham, Rush 

 Gabrielson, and my wife helped with the study. As far as I 

 am aware Mr. Smith carried on his study alone. It was in- 

 tended that the last nest (nest C) be studied and reported 

 jointly with Mr. Smith. But he was detained, by other du- 

 ties, from giving as much time to the work as was planned. 

 However, the author is under obligations to him for frequent 

 relief in the blind, and also for permission to make use of 

 the data obtained from the study of nest B. I wish to thank 

 Prof. T. H. Macbride for placing at my disposal the facil- 

 ities of the Iowa Lakeside Laboratory. I am under obliga- 

 tions to a number of the students of the Laboratory for as- 

 sisting in the work in various ways. I wish finally to express, 

 my thanks to Prof. T. C. Stephens for his advice and assis- 

 tance thruout the work and in the preparation of this report. 



Nest Location. 

 The Sioux City nest was discovered on June 15 and at 

 that time contained three eggs. It was not visited again 

 until June 28 when the young were about six days old. The 

 nest was built in a partly broken down wahoo bush (Evon- 

 ymus atropurpnYeiis J acq.) on the bank of a steep sided little 

 ravine. The ravine was densely covered in most places by 

 willows (SalLv spf), elderberry {Sambiicus canadensis L.), 

 and dogwood (Cornus stolonifera Michx.). The whole was 

 overgrown with a tangle of vines of various species which 

 made it almost impenetrable. Just across the fence was lo- 

 cated a cherry orchard with blackberry and raspberry bushes 

 between the tree rows. Nest B was discovered on June 24 

 in a small willow {Salix longifolia Mihl.) on the lake shore. 



