518 Recently published Ornitholoyical TT'(;?-/"^, 



of Camden, New Jersey, a city of 100,000 inliabitants^ is 

 given by Mr. Julian Potter. The number which succeeded 

 is remarkable. Among hollow-tree dwellers it was 82 %, 

 ground-nesters were 51 %, and tree- and bush-dwellers 43 %. 

 The usual report on bird-migration in the Delaware Valley 

 by Mr. Witmer Stone, and notes on the rarities which have 

 occurred during the past year, all contribute to make a 

 most successful number of one o£ the best of the American 

 ornithological publications. 



Journal of the South African Ornithologists' Union. 

 [The Journal of the South African Ornithologists' Union. Vol. xi. 

 no. 1. Pretoria, December 1915.] 



The present number of our contemporary in South Africa, 

 though dated December 1915, only reached us on May 18. 

 AVe do not know when it was actually published, but we 

 presume some time subsequently to December 1915. If so, 

 the date of publication should be given as the omission may 

 give rise to considerable confusion in later years. 



The longest and most important paper in the present 

 number is one by Mr. C. F. M. Swynnerton. He recounts 

 fr(mi the ornithological point of view the numerous experi- 

 ments he has made on the relations of birds to their insect 

 prey, especially butterflies and moths. The present series 

 deals with the VVood-Hoopoe {Irrisor erylhrorhynchus) , the 

 Hornbills {^Loplioceros leucomelas and L. melunoleiicns), and 

 the Babbler {Crateropus kirki). 



The feeding experiments (seventy-three in number) with 

 these species ai'e all given in considerable detail, and the 

 final pages contain a discussion of results and conclusions. 

 This contains the pith of the paper, and deals first with 

 methods of attack in the case of stinging insects such as 

 wasps, or hard glossy beetles, or swiftly flying insects such 

 as butterflies. Another paragraph deals with methods of 

 search, and tells how careful and minute is the search 

 of bark, twigs, and leaves by the smaller birds such as 

 Warblers and Tits, and the way in which large parties of 

 diverse species join in a combined " drive " tiirough the 



