1913] 



Swarth: Gccse of Calif or inn 



15 



Fig. a. — Branta canadensis canadensis, adult male, no. 21971, Los BafLos, Cali- 

 fornia; lateral view of head and bill; x 0.83 +. 



Fig. B. — Branta canadensis hutchinsi, adult male, no. 22004, Los Bafios, Cali- 

 fornia; lateral view of head and bill; x 0.83 +. 



Fig. c. — Branta canadensis minima, adult male, no. 22018, Los Bafios, Cali- 

 fornia; lateral view of head and bill; x 0.83 +. 



These figures, approximately natural size, show the relative proportions of 

 the bill in the three forms, one of the most reliable single characters differ- 

 entiating the subspecies. 



