340 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



are no larger. There results a slight average difference in series, leav- 

 ing a number that can be placed with either group. Color differences 

 are not discernible except to note that there is considerable indi- 

 vidual variation. 



There are two females from Tres Zapotes, taken on March 18 and 

 April 13, and one from Tlacotalpam shot on February 5, with wing 

 measurements of 61.9, 62.2, and 63 mm., that on the criteria set up 

 by Miller and McCabe could be placed with their dlticola. The other 

 specimens coincide with the Uncolnii of these authors. I prefer to call 

 all Uncolnii. 



