Recently published Ornithological Works. 613 



95. Buttikofer's Sketches of Liberia. 



[Reisebilder aus Liberia. Eesultate geographischer, naturwissen- 

 schaftlicher, und ethnograpliischer Untersuchungen wahrend der Jalire 

 1879-1882 und 1886-1887. Von J. Buttikofer. 2 vols. Svo. Leiden : 

 1890.] 



Herr Biittikofer has devoted a chapter of his interesting 

 work on Liberia^ where, as is well known, his explorations 

 have achieved excellent results in every branch of natural 

 science, to its Birds — a subject on which he is our leading 

 authority. The various forms characteristic of the Liberian 

 ornis are shortly described, and their chief peculiarities are 

 pointed out. Besides a series of pretty woodcuts of birds 

 and nests, coloured plates are given of two species — Accipiter 

 bilttikoferi and Bubo lettii. 



96. Fioi'e on the Calabrian Avifauna. 



[Materiali per una Avifauna Calabra. Appunti di Ornitologia Calabra 

 raccolti dal Bar. Carlo de Fiore. Svo. Roma : 1890. Pp. 76.] 



After describing the topography and physical features of 

 the district. Dr. de Fiore gives a list of the 219 species 

 of birds as yet recognized as found in Calabria, with remarks 

 pn the times and particulars of their occurrences. Tables of 

 the sedentary and migrant species are subjoined. Seventy- 

 six species are stated to breed in the district. 



97. Gatke on the Birds of Heligoland. 



[Die Vogelwarte Helgoland. Von Heinrich Gatke. Herausgegeben 

 von Prof. Dr. Rudolf Blasius. Svo. Braunschweig: 1881. Pp.610.] 



"With the editorial assistance of Dr. R. Blasius, Herr Gatke 

 has now got out his long-promised and most interesting 

 volume on the birds of Heligoland, and, as announced in our 

 last number, has favoured us with an early copy. Gatke's 

 book contains three chapters, the first being a treatise on 

 migration, as studied during the author's fifty years' resi- 

 dence in Heligoland, divided into nine sections ; the second 

 containing observations on the alterations effected in the 

 plumage of birds by change of colour in the feathers without 



