Recent I y pablisfied Oniitholoyical Works. 271 



many of the closely-allied Warblers — a very difficult task 

 to accomplish. We fail to see why the claims of the 

 Aquatic Warbler to rank as a "British" bird should be 

 considered superior to those of the Great Reed-Warbler, the 

 Icterine Warbler, and other birds which occurred iu Britain 

 years before the Aquatic Warbler was recognized. The 

 families treated in this volume are the Tnrdidse, Cinclidse, 

 Panuriihe, Paridse, Sittidai, Troglodytidie, Certliiidie, and 

 Motacillidse. 



35. B'dttikufer on a new Duck. 



[On a new Duck from the Island of Sumba. By Br. J. Biittikofer. 

 Notes Leydeu Mus. xviii. p. 59.] 



An imperfect skin from the East-Indian island of Sumba, 

 and now in the Leyden Museum, is referred by Dr. Biittikofer 

 to a new species of rather uncertain position, which he names 

 for the present Anas salvadorii. It is allied to Nettion 

 castaneum and Elasmonetfa chlorotis of Count Salvadori's 

 ' Catalogue.^ 



36. Biittikofer on two Generic Names of Birds. 



[Rectification of two Gejieric Names. By Dr. J. Biittikofer. Notes 

 Leyden Mus. xviii. p. 58.] 



Dr. Biittikofer changes his names Centrolophus and Gym- 

 nocrotaplius, lately proposed for two genera of Pycnonotine 

 forms, to Bostrycholophus and Bonapartia respectively. 



37. Capek on the Reproduction of the Cuckoo. 



[Beitrage zur Fortpflauzungsgescliichte des Kuckticlvs, "\'on W, 

 Capek. Oruith. Jalirb. vii. 1896.] 



Although the literature on the Cuckoo and its reproductive 

 vagaries is already so large, Ilerr Capek has done mcII, we 

 think, in giving us the benefit of his personal experiences on 

 this subject and of his deductions therefrom. They have 

 been made at Oslawau, near Brunu, in a secluded district of 

 Moravia, where Cuckoos are apparently very abundant, and 

 have been continued for manv vears. The catalogue of 



