Recently published Ornithological Works. 651 



91. Kollibay on the Birds of the Bocche di Cattaro. 



[Die Vogelfauna der Bocche di Cattaro. Von Paul Kollibay. J. f. 0. 

 1904, pp. 80-121.] 



The Bocche de Cattaro are in a charming country for 

 the Ornithologist, and Herr Kollibay, who had previously 

 experienced the attractions of Dalmatia (cf. Ornith. Jahrb. 

 1903, p. 23), resolved to visit it again. His sojourn in Castel 

 Nuovo during May last year and the great assistance received 

 from a bird-lover resident in the district have led him to 

 compose a complete account of this remarkable Ornis. It 

 contains twenty-two species of Sylvian Warblers besides other 

 attractive forms, mostly breeding in the district. Amongst 

 these is the Olive-tree Warbler (Hypolais olivetorum), 

 concerning the nidification of which further accurate informa- 

 tion was much wanted, as the bird had been confused by some 

 writers ( Brusina, amongst others) with the nearly allied 

 H. pallida. Herr Kollibay found this Warbler abundant at 

 certain localities in the Bocche, and obtained two clutches 

 of three and four eggs respectively. Sylvia nisoria and Sylvia 

 orphea jerdoni (i.e., the eastern form of S.orphea) were like- 

 wise common in certain spots. 



Herr Kollibay also goes deeply into the difficult question 

 of the two Wheatears Saxicola ampliileuca and S. melanoleuca 

 and their eastern and western forms. 



92. Kolthoff on North Polar Birds. 



[Bidrag till kannedoin ora Norra Polartrakternas Diiggdjur och 

 Faglar af Gustav Kolthoff. Kongl. Svensk. Vet.-Akad. Haudl. xxxvi. 

 no. 9 (1903).] 



This article gives a carefully revised list of the mammals 

 and birds which have, up to the present time, been met with 

 in the Northern Polar area, together with notes on their 

 range, and, in most cases, on the habits and nidification of 

 the various species of birds. Herr Kolthoff unites the 

 Greenland and Iceland Gyrfalcons with Falco gyrfalco, 

 stating his reasons for so doing, and also gives full particulars 

 to shew why Lagopus hemileucwus should be considered a 



