73 Aves. 
Subject Index. — Ethology. 
5819 
Turdua musicus, einige Bemerkun- 
gen zum Gesang ; Lindner, 777. 
Fringilla coelebs , the singing com- 
petitions ; Grobbels, 481. 
Psychology. 
Ein Beitrag zur Psychologie ; Witzl- 
steiner, 1516. 
Beitrage zur Psychologie ; Lucanus, 
799. 
Problems of avian psychology ; 
Menegaux, 894. 
Vom Instinkt dor Vogel; Briickner, 
192. 
Untersuchung des Farbensinnes der 
Vogel liach deni Prinzip der Seebeck- 
Holmgrenschen Probe ; Hess, 584. 
L’immobilite dans le mimetisme 
d4fensif et olTensif chez l’Oiseau ; Masse, 
857. 
Gegenseitige Hilfe in der Vogelwelt ; 
Wagemann, 1450. 
The relation of strength of stimulus 
to rate of learning in the chick ; Cole, 
296. 
The voices of pigeons regarded as a 
means of social control ; Craig, 306 : 
The expressions of emotion in the 
pigeons ; Craig, 307, 308 : Oviposition 
induced by copulation in the pigeon ; 
Craig, 309. 
Some labyrinth habits of the Domestic 
Pigeon ; Hunter, 619. 
L’instinct du retour chez le Pigeon 
voyageur ; Hachet-Souplet, 505. 
The Psychology of the Anatidac ; 
Heinroth, 548. 
Ciconia alba , Wic entleert sicli der 
junge Storcli ? ; Schuster, 1254. 
How the V ulture finds his carrion ; 
Reiser, 1126. 
Ein Fall von Warmeempfindungs- 
Tauschung bei jungen Raubvogelu ; 
Biedermann-Imhoof, 128. 
Von dem geistigen Leben der Psitta- 
ciden ; Braun, 168. 
Life and behavior of the Cuckoos of 
Europe and the United States ; Herrick, 
580. 
Sitta eaesia beim Offnen von Niissen ; 
Eysell, 385. 
Selbstmord eines Eiclielhahers ; 
Bacmeister, 51. 
Colour and Moult. 
Einfluss des Klimas auf die Farbung 
(Russ.) ; Nesterov, 946. 
Changes of colour due to captivity ; 
Maillard, 841. 
On metallic colouring in birds ; 
Michelson, 907. 
The relative conspicuousness of 
barred and self-colored fowls ; Pearl, 
1032. 
Colour variation in Carpodacus fron- 
talis owing to introduction into the 
Hawaiiau Isl. ; Grinnell, 473. 
Sexual coloration and moult in the 
California Linnet; Grinnell, 480. 
Thayer’s theory of revealing and 
concealing coloration discussed by 
Roosevelt, 1158 ; Allen, 10; Barbour 
and Phillips, 87 ; and Thayer, 1364, 
1365. 
Plumage changes in the Grouse ; 
Lovat, 797. 
Discussion on the partial summer 
plumage of the male Red Grouse ; 
Millais and Ogilvie-Grant, 908. 
Seasonal change of plumage in the 
Partridge and Ptarmigan ; Ogilvie-Grant, 
991. 
Moult of Larus ridibundua ; Poncy, 
1080, 1081. 
Male Black Grouse and Pheasants 
assuming female plumage ; Millais and 
Pycraft, 909. 
Female Pheasants assuming male 
plumage and males assuming female 
plumage ; Pycraft, 1091. 
Female Redstart (Ruticilla pliocni- 
curua) assuming male plumage; Nicoll, 
957. 
Abnormal plumage in Tetrao tetrix ; 
Witherby and Ogilvie-Grant, 1514. 
Parasites and Pathology. 
Parasiten der Vogel als Hinweis auf 
deren Phylogenie (Russ.) ; Solovjev, 
1305. 
The English Sparrow as an agent in 
the dissemination of chicken and bird 
mites ; Ewing, 383. 
