new Pakearctic Goose. 7 



(as in A. segetum) is further backward than in A. brachy- 

 rhynchus. This is clear on comparison of the angle formed 

 by the lines which go to the angle of the mouth from the 

 top of the nail and from the hindermost point on the upper 

 portion of the bill ; this angle is obtuse both in the new 

 species and in A. segetum, but acute in A. hrachyrlnjnchus. 

 The bill of the example of A. segetum obtained by me in the 

 government of Ufa is very similar to the figure of the bill 

 of ".4. segetum, Naum./^ given in 'Naumannia' for 1853 

 (p. 7). The eight specimens of the new Goose all have 

 the bill slender, from the lesser development of the maxilla, 

 and the more curved nail, the horny teeth being small. But 

 some specimens of ^4. segetum have also the bill similarly 

 developed, as may be seen on the figure of the bill of ''A. ar- 

 vensis, Brehm," in the same volume of ^Naumannia' (1853, 

 p. 7, fig. B). 



As regards coloration, the new Goose is far more distinct 

 from A. br'achyrhynchus than from A. segetum. Whilst 

 A. brachyrhynchus, in the coloration of its upper parts, 

 especially in that of the wings, is not unlike A. cinereus, 

 having these parts very conspicuously tinged with bluish 

 grey, our new bird is comparatively very dark. It seems 

 to me that the most notable colour-diflference both of the 

 new Goose and of A. segetum from A. brachyrhynchus is as 

 follows : — In the new Goose and in A. segetum the carpal 

 upper coverts are dark bluish grey, and the greater upper 

 coverts of the antibrachium dark brown, without any tinge 

 of bluish, whereas in A. brachyrhynchus the anterior great 

 upper coverts of the antibrachium and the carpal upper 

 coverts are both of a clear bluish grey. 



From A. segetum the new Goose differs in the much darker 

 colour of the head and neck, especially of the hinder parts, 

 and in tbe browner edges of the dark-coloured feathers of 

 the upper parts and flanks. Some specimens have a very 

 slight white mark at the base of the upper mandible. 



From the above-mentioned characters I arrive at the con- 

 clusion that the Goose obtained by me in the government of 

 Ufa is distinct both from A. segetum and A. brachyrhynchus, 



