III. 46 



A, The upper surface of the wing of a Little Stint ITringa minuta) to 

 show (a) the difference between the "distal" and "proximal" overlap — the 

 former shown by the major, the latter by the median coverts — and (6) the " fault- 

 ing " which results in the formation of an " intercalary row " in diastataxic wings. 



B, Upper surface of a portion of the forearm of an Owl to show the diasta- 

 taxic condition of the wing. 



