PLATE 31 



ii 



Neck-mark in Streptopelia risoria. 



A. The separate feather is the darkest one from the neck-mark (left-side). X 3. 



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. Forcomparison 



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

 in tiro lori, lateral and posterior. 



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



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. 



