260 



BRITISH BIRDS. 



[vol. X. 



Ch. hiaticida. 



Winter males 



Narrow line on forehead and 

 broader stripe throngh lores and 

 ear-coverts — black. 



Broad band on forepart of 

 crown black. 



Cl>. semipaimatus. 



No black line or stripe, these 

 parts being di-ab colour. 



Nuchal collar black and well 

 defined. 



Pectoral band broader and 

 black. 



Inner (not the long innermost) 

 secondaries with much more 

 white. 



Summer 



Plumage as in winter. 



Xo band of black, but oc- 

 casionally some black-brown 

 feathers. 



Ill defined : sometimes absent 

 and sometimes mixed with drab 

 feathers. 



Narrower especially towards 

 the centre and drab inter-mixed 

 with black-brown feathers. 



With considerably less white. 



metJes, 



Differs from winter and be- 

 comes like Ch. hiaticida except 

 for the secondaries which differ 

 as in winter. 



Winter females. 

 Band on forepart of crown Band absent. 



black, intermixed with brown 

 feathers. 



Nuchal collar black, less well 

 defined than in male and some- 

 times intermixed with brown 

 feathers. 



Pectoral band black, inter- 

 mixed with brown feathers. 



Inner secondaries as in male. 



Nuchal collar absent. 



Narrower especially towards 

 centre and drab colour not 

 black. 



As in male. 



Summer females. 



Becomes like the male. 



Becomes like the sunimer male 

 but sometimes has drab-coloured 

 feathers in the pectoral band 

 and in the patch below the ej-e 

 and in the eai'-coverts. 



Miss Jackson provides me Avith the following measurements 

 in millimetres of Ch. semipaimatus 



^ wing 121-128, tail 48-56, tarsus 22-24, bill 12-14 



$ wing 121-126.5 bill 12-14 



In The Ibis (1014, pp. 398-9) Dr. P. R. Lowe gave the follow- 

 ing measurements of the wings of birds which he separated 

 as Ch. hiaticnla hiaticula (^ 120-132 (one 112 and one 116), 

 ? 124-130 (one 117), Ch. h. major ^ 127-138, ^ 127-136. 



H. F. WiTHERBY. 



