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Neck-mark in Streptopelin risoria. 

 A. The separate feather is the darkest one from the neck-mark (left-side). 



X3. 



B. Juvenal ring-dove; same as figure C. Hayashi del., July 1902. 



C. Juvenal ring-dove; 6 weeks old. X 1.2. Hayashi del., July 1902. For comparison 



of Juvenal neck-mark in other doves. The darker feathers of mark begin here 

 in two loci, lateral and posterior. 



D. Adult female ring-dove. X 2. Apr. 25, 1902. The skin was split up in middle 



of neck (in front) and spread out to show entire ring; outside feathers pulled 

 out. Five rows of feathers in each half (right to left) of ring, but 3 rows 

 make most of the ring. At extreme upper and lower margins of the ring are 

 feathers with lighter tips. 



