6 Nelson — New Birds from Western Mexico. 



Madarasz has described a Vireo from a collection made there in 

 1881 by Mr. A. Forrer. Mr. Xantus is supposed to have visited 

 the islands during his stay on the west coast of Mexico, but we 

 have no definite information in regard to his trip. 



I am indebted to Dr. C. Hart Merriam, Chief of the Biological 

 Survey, for the opportunity to prepare the present paper. My 

 thanks are due also to Mr. Robert Ridgway, Curator, and Dr. 

 Chas. W. Richmond, Assistant Curator, of Birds in the U. 8. 

 National Museum, for continued favors during the progress of 

 my work on Mexican birds. 



All of the birds described below, except the Magdalena Wren, 

 which seemed to be restricted to Magdalena Island, were taken 

 on Maria Madre Island, and probably occur on the other islands 

 also. 



All measurements are in millimeters. 



Columba flavirostris madrensis subsp. now Tres Marias Pigeon. 



Type No. 156698, IT. S. Nat. Mus., Biological Survey Coll., tf ad., Maria 

 Madre Island, Mexico, May 13, 1897. Collected by E. W. Nelson and 

 E. A. Goldman. 



Description. — Differs from typical C. flavirostris in somewhat larger size; 

 decidedly larger and longer bill and generally paler colors; lower border 

 of greater wing coverts broadly margined with white as in Columba gym- 

 nophthalma. Dimensions of type: wing, 209; tail, 138; culmen, 17; 

 tarsus, 26. 



Average measurements of Columba flavirostris. — $ (4 specimens) : wing, 

 195.5; tail, 123.5; culmen, 13.7; tarsus, 24.7. 9 (3 specimens): wing, 

 193; tail, 120.6; culmen, 14.1; tarsus, 25.3. 



Average measurements of C. flavirostris madrensis. — <$ (4 specimens) : 

 wing, 202.7; tail, 129; culmen, 15.7; tarsus, 27.1. 9 (3 specimens): 

 wing, 201 ; tail, 127; culmen, 16.6; tarsus, 26.3. 



A single specimen from the islands lacks the white margins on the 

 greater wing en verts, but has all the other characters of the insular race, 

 such as the large hill and pale colors. This is the only one among a dozen 

 in- more specimens examined which lacked this marking. The mainland 

 yellow-billed pigeon not infrequently has a narrow margin of white on 

 the borders of the greater coverts, but I have never seen one in which 

 this character is so striking as on the ordinary island birds. 



Leptotila capitalis subsp. now Tres Marias Dove. 



Type No. 156709, U. S. Nat. Mus., Biological Survey Coll., ad. tf, 

 Maria Madre Island, Mexico, May 6, 1897. Collected by E. W. Nelson 

 and E. A. Goldman. 



Description of type. — Forehead, and crown to line between middle of 



