Vol. XXX., No. 1. 



January, 1921. 



CONTENTS. 



PAGE 



The Relation of Song to the Nesting of Birds — J. P. 



BURKITT . . . . . . . . . . I 



Notes on Lepidoptera in 1920— Rev. W. F. Johnson, 



M.A. . . . . . . . . . . . . II 



Irish Societies : 



Dublin Microscopical Club ., .. 13 



Belfast Naturalists' Field Club . . . . . . 14 



Notes : 



An Aberration of Argynnis aglaia — W. Crawford . . . . 15 



Return of the Golden-crested Wren and Long-tailed Titmouse — 



Nevin H. Foster, f l.s. . . .. .. .. 15 



Migration Season of the Corncrake — J. P. Burkttt . . 16 



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