36 



Miller, New Jay from Mexico. 



| Aul 

 Ljan 



differences between the bills and feet of the two species. They 

 were made by Mr. Frank Miiller from the type of A. gracilis and 

 an adult male A. couchi, the latter taken at Villar, San Luis Potosi. 



Aphelocoma couchi is now known to range from Monterey, 

 Nuevo Leon (the type locality), south to Zacatecas and central San 

 Luis Potosi. Over this area the species is very constant in size 

 and color. The more southerly specimens, however, are slightly 

 larger than those taken farther north, while the largest in the 

 series came from Jerez, Zacatecas. The fact that this specimen, 

 taken at a point nearer the type locality of Aphelocoma gracilis 

 than any of the others, differs most widely of all from the smaller 

 bird is a strong argument in favor of the specific distinctness of 

 the two forms. 



My thanks are due to Mr. Robert Ridgway for the opportunity 

 to examine the original specimens of Aphelocoma couchi; and to 

 Dr. C. Hart Merriam for the use of the Jays in the collection of 

 the United States Department of Agriculture. 



