196 



Oberholser on a JVerv Mt/rs/f IVrrii. 



r Auk 



L April 



is under especial obligation to Mr. Robert Ridgway, at whose 

 suggestion the preparation of this paper was undertaken. 



Comparative measurements of the forms here treated are given 

 below. 



CoMl'ARATIVE MEASUREMENTS. 



CistotJioriis. palusiris. 



Ciitothorus paliistn's p/csiiis. 



Ci$tothorus palustris paludicola. 



Average of 9 specimens. 



Maximum. 



Minimum. 



5-1 



5-5 

 4-5 



' Excludes four in worn plumage. 

 ^ Excludes three in worn plumage. 

 •' Excludes one with bill broken. 



