100 



THE OOLOGIST 



Days with the Blue-gray Gnatcatch- 

 er and Prothonotary Warbler, by 

 George Stuart, the Third, which is a 

 well written article disclosing among 

 other things the amount of work 

 necessary at times and in localities to 

 become even slightly acquainted with 

 that splendid bii'd, the Golden Swamp 

 Warbler. — Prothonotary Warbler with 

 which our boyhood studies and inves- 

 tigations are closely associated, it be- 

 ing one of the commonest Illinois Val- 

 ley nesting birds. 



Egg and Nestling Destructron. by 

 Julian K. Potter, which is a splendid 

 article discussing the success and non- 

 success of the nidification of the var- 

 ious birds, reducing the deductions to 

 a percentage basis. These figures are 

 truly interesting. 



Mortality Among Birds at Philadel- 

 phia, by Deloss E. Culver, discussing 

 the destruction of birds, caused by fly- 

 ing against the City Hall tower, giving 

 a list of nineteen varieties, aggregat- 

 ing 424 birds; a truly appalling num- 

 ber. 



Bird Notes, consisting of records of 

 unusual occurrences for the year 1915. 

 Report of Spring Migration of 1915, 

 compiled by \Vliitmer Stone, being a 

 very exhaustive review of this migra- 

 tion. 



An Abstract of the Proceedings of 

 the Delaware Valley Ornithological 

 Club for 1915, by J. Fletcher Street, 

 Secretary. 



Club Notes, being a review of the 

 Club's activities for the year, and a 

 list of specimens donated to the Club 

 Museum for that year. 



Concluding with a Bibliography for 

 1915 of papers relating to the birds of 

 Pennsylvania, New Jersey and Dela- 

 ware, not the least interesting of 

 which to the Editor is the fact that 

 this discloses that of all the published 

 articles therein listed, ten appeared in 

 The Auk, eleven in Bird Lore, twenty 



in The Oologist, and four in the Wil- 

 son Bulletin, showing that THE OOLO- 

 GIST recorded almost twice as many 

 as all the other publications put to- 

 gether — a record which we owe to our 

 friends who kindly sent us the ob- 

 servations for publication, and to 

 whom we are under obligations for the 

 same. R. M. Barnes. 



Owls Within Owls. 

 On Thanksgiving day, 1915, a local 

 hunter brought me an adult female 

 Barred Owl for mounting. From all 

 external appearances, it was a usual 

 specimen; but I was greatly surprised 

 upon examining its stomach to find 

 it well filled with feathers. I washed 

 and dried these feathers and was still 

 more greatly surprised to find them 

 feathers of an adult Screech Owl, grey 

 phase! 1 have heard of Hawks eating 

 Owls, and I once had a Texan Barred 

 Owl caught by Ramon Graham — an 

 old Fort Worth friend of mine — which 

 was just cannibal enough to kill and 

 eat a Barn Owl which lived in the 

 same cage, — but I never knew before 

 that live wild Owls ever ate their 

 "cousins." 



George M. Sutton. 



Data Blanks. 



I would like to say a few words con- 

 cerning datas. 



Both common and scientific names 

 should be used. The A. O. U. number 

 and the date in full, also the locality. 

 Incubation sliould state whether fresh, 

 just started or how far advanced; such 

 a statement as advanced is rather in- 

 definite. Identifications such as sure, 

 positive, no question and certain, are 

 very poor, and should not be used; 

 saw birds, fluslied male or female, are 

 much preferable. 



Under "Remarks" or "Nest," a full 

 statement concerning exact location, 

 construction and material used should 



