6o 



Nelson, Nb'm Birds from Mexico'and Guatevuihi. 



TAuk 

 LJan. 



forms there is now a broad area several hundred miles across in 

 which neither is known to occur. Two males in the National 

 Museum collection from the Pacific coast of Mexico (one from 

 the State of Colima and the other from Mazatlan) are smaller 

 than table-land specimens in length of wing and tail, and their 

 bills are slenderer, thus approaching the California bird. 



Measurements of Agelaius gubernator califoriiicus from California. 



Measurements of Agelaius gubcrnator gubernafor from the Mexican 



Table-land. 



