RENDAHL, BIRDS FROM THE PEARL ISLANDS. 



43 



The skin examined by Thayer and Bångs is said in all 

 respects to agree with specimens from Panama. 



70. Thryophilus galbraitliii conditus (Bångs). 



Thryophilus galhraithii Bångs, Auk. XVIII. 1901. 30 (San Miguel). 

 Thryophilus galbraithii conditus Bångs, Proc. New. Engl. Zoöl. Club IV. 1903. 



3 (San Miguel; type) — Ridgway, Birds North Middle Am. III. 1904. 



638 (San Miguel) — Thayer and Bångs, Bull. Mus. Comp. Zoöl. XL VI. 



1905. 154 (San Miguel). 



BovALLius' Collection: 4 (^(^, Viveros, April 8 to 11. 



This form, if quite a distinct island subspecies, is very 

 nearly allied to the form of the adjacent mainland. It is said 

 to be slightly deeper colored than the latter, a statement on 

 which I cannot pronounce an opinion, owing to lack of ma- 

 terial from the main. As to the measurements, these in the 

 present skins seem to agree with the statements of the quoted 

 authors, that the island form is slightly larger than true Th. g. 

 galbraithii. They are as follows: 



Fam. Yireonidae. 

 71. Yireosylva flavoviridis insulanus (Bangs). 



Vireo chivi agilis Bangs, Auk. XVIII. 1901. 30 (San Miguel). 



Vireo insulanus Bangs, Proc. New Engl. Zoöl. Club III. 1902. 73. (San Miguel; 



type). 

 V ireosylva insulanus 'R.iDGWA.Y, Birds North IMiddle Am. III. 1904. 147 (San ]\Ii- 



guel) — Thayer and Bangs, Bull. Mus. Comp. Zoöl. XL VI. 1905. 154 



(San Miguel; Saboga). 



Bovallius' Collection: 1 ?, Viveros, April 9. 



This bird is very nearly allied with F. flavoviridis flavo- 

 viridis (C a s s i n), which occurs on the mainland from northern 

 Mexico to Peru and Bolivia. The San Miguel form differs by 

 its smaller size, duller coloration of back, and more pronounced 

 lateral line of pileum and påle superciliary stripe. 



