140 Bulletin American Museum of Natural History. [Vol. XXXIV. 
character been cited as diagnostic of the Pandionidze among the typical 
Accipitres. In recently examining a fresh Osprey I was therefore surprised 
to find a perfectly distinct aftershaft with stiff, elastic shaft, on the feathers 
of the interscapulum, rump and crissum. A feather from each of these 
regions shows the following measurements of main feather (excluding 
barrel) and aftershaft respectively: 47 mm., 8.5 mm.; 39,8; 75,10. The 
plumage of the underparts in general has no aftershaft. 
