APPENDIX TO 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 L. rupestris 

 tow7ise?idi (Auk, xiii. pp. 24-29, 1896). The former is figured 

 (t. c. pi. iii.), and appears to be indistinguishable from the 

 male of the common Ptarmigan of Europe {Lagopus 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 spatzty Reichenow, J. f. O. 1895, p. no. 



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 chukarizi. 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 

 js impossible to define where one begins and the other ends. 



