47 [Vol. XXXV. 



For comparison, Mr, Ogilvie-Grant also exhibited ex- 

 amples of : — 

 Caccabis rufa. 



a. Adult male in normal plumage. 



h. Grey variation with no rufous on any part of the 

 plumage. 



c. Pied variation, with most of the back white. 



d. Light variation^ nearly white^ but with the crown and 



nape mostly vinaceous, the mantle washed with that 

 colour, and the flanks streaked with pale chestnut; 

 all black pigment being absent from the plumage 

 except a narrow band at the base of the bill and 

 extending to the ear-coverts. 



Of the Common Partridge the following variations in 

 colour were exhibited: — 

 Perdix perdix. 



a. Adult male. Grey form. 



b. Immature male. Grey form, with very pale chestnut 



horse-shoe. 



c. Immature. A pale whitish form with spots on the 



wings and back, bars on the flank-feathers, and 

 horse-shoe on the breast bright chestnut colour. 



d. Female. White with very pale greyish markings. 



Perdix perdix, var. Montana. 



e-g. Three adult examples, typical forms : two from 

 France and one from Shrewsbury. 

 h. Immature female. A very dark form inclining to 

 black on the feathers of the upperparts ; still in 

 partial nestling plumage on the head, neck, middle 

 of the breast and flanks. 



This remarkable chestnut variation was first described as 

 P. Montana by Brisson in 1760 from the Mountains of 

 Lorraine. In 1823 Latham described it as the " Cheshire 

 Partridge.^' Since then it has occurred from time to time 

 in almost every county in England and in parts of Scotland. 

 It appears comparable among Common Partridges to the 



a 5 



