PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 108 Washington : 1958 No, 3404 



ADVANCES IN OUR KNOWLEDGE OF THE HONEY-GUIDES 



By Herbert Friedmann 



In the following pages I have brought together new information on 

 various aspects of the biology of the honey-guides that has come to 

 attention since the publication of my book in 1955. Together with 

 these additional data, I have made such comments as seem necessary, 

 either for their proper evaluation or for their allocation with respect 

 to earlier knowledge. Only two phases of honey-guide studies are not 

 included: Purely systematic data, and my continuing investigations 

 on wax digestion, the results of which will be presented separately. 



In addition to such notes as have appeared in print and which are 

 here collated, I am indebted to the following for unpublished obser- 

 vations: J. P. Chapin, W. R. Ingram, C. H. Jerome, D. W. Lamm, 

 H. M. Miles, B. Neuby-Varty, R. H. Stevenson, V. G. L. van Someren, 

 and J. M. Winterbottom. 



Additional Data on Eggs and Egg-Laying 



Because of the difficulties attached to study of ovulation in para- 

 sitic birds, one must always be alert for incidental data bearing on this 

 topic. The new information is as follows: 



1. Greater honey-guide, Indicator indicator 



One observation bearing on the time of day of ovulation comes to 

 me from J. M. Winterbottom. On Sept. 16, 1943, in the northwestern 



46936fr-68 309 



