198 
Recently published Ornithological ft orks. 
Spermestes nigriceps and Tharrhaleus jerdoni (by Mr. W. E. 
Teschemaker), Trachyphonus cafer (with a good coloured 
plate) by Major B. 11. Florsbrugh, and Neophema venusta 
(by Mr. W. A. Fasey). 
Dr. A. G. Butler discusses the question of morality in 
Birds; Mr. F. Finn continues his notes on (( Aviculture at 
the Zoo” (in which special attention is drawn to the splendid 
Eagle Pithecophaga jefferyi and two fine males of Paradisea 
apoda received from Sir W. Ingram), and gives us a further 
instalment of his “ Stray Notes on Indian Birds,” with 
a note (p. 331) on the warty heel-pads of two species 
of Woodpecker [Vendrocopus macii and Brachypternus 
aurantius). 
In the “ Correspondence ” Mr. E. J. Brook furnishes a 
list of rare birds now in his aviaries, brought by Mr. Good- 
fellow from New Guinea. 
5. Bonhote on Migration. 
[Migration Notes from North Holland. By J. Lewis Bonhote. Ornis, 
1909, pp. 162-173.] 
These Notes are the result of two visits made bv our 
fellow-member to Holland, the first in the last week of 
August 1906, and the second for a month in the autumn of 
1908. One of the North Sea islands was selected, and six 
miles of sandy and muddy shore brought under observation. 
A considerable number of species were noticed, but no great 
“ rushes” were chronicled, a fact possibly due to the 
weather, which was summer-like, with light, breezes. 
Mr. Bonhote’s conclusions are as follows :—(1) That migra¬ 
tion is usually undertaken in small parties rather than in 
large flocks ; (2) that the number of species migrating on 
any particular day varies inversely as the barometric 
pressure ; (3) that migratory birds are excessively fat on 
their departure, and thin on their arrival; (4) that among 
the Limicolae the balance of evidence is in favour of the 
adults migrating earlier than the bulk of the young. 
