eee NOX STOp VOL I: 
Page 42. LAGOPUS RUPESTRIS. 
Professor D. G. Elliot has described a species from Attu 
Island, Alaska, as Lagopus evermanni, and another race from 
Kyska and Adak islands in the Aleutian chain as LZ. raupestris 
townsendi (Auk, xiii. pp. 24-29, 1896). The former is figured 
(t. c. pl. iii), and appears to be indistinguishable from the 
male of the common Ptarmigan of Europe (Zagopus mutus) in 
breeding or summer plumage, a fact which seems strongly to 
favour the theory that only one polymorphic species of 
Ptarmigan exists. 
Page 97, add :— 
SPATZ’S RED-LEGGED PARTRIDGE. 
Caccabis spatzt, Reichenow, J. f. O. 1895, p. IIo. 
Under the above name Dr. Reichenow has separated the 
paler desert form of the Barbary Red-legged Partridge met 
with in the south of Tunis from the darker birds inhabiting 
the wooded steppes of the north, which he regards as typical 
C. petrosa. 
Caccabis petrosa, like Caccabis chukar (cf. vol. i. p. 93), might 
no doubt be divided into several races, the colour of the 
plumage being darker in wooded districts, where the annual 
rainfall is greater than in the more arid deserts. Generally 
speaking, it is useless to call such climatic races by different 
names, for they merge imperceptibly into one another, and it 
is impossible to define where one begins and the other ends. 
