THAYER AND BANGS : PEARL ISLANDS BIRDS. 155 



HIRUNDINIDAE. 

 67- Progne chalybea chalybea (Gmel.). 



Five adults, both sexes, San Miguel Island, March. One colony of this dull- 

 colored martin was nesting in the church at San Miguel ; it was not seen else- 

 where in the islands. 



MNIOTILTIDAE. 

 *68. Protonotaria citrea (Bodd). 

 Three females, San Miguel Island, February 24, March 2 and 13. 



*69. Vermivora peregrina (WiLs.).i 



Three males, San Miguel Island, February 26 and March 1, Saboga Island, 

 April 1 . The specimen killed February 26 is moulting, as is also the one March 

 1, the olive green feathers of the cap being replaced by gray ones, and new 

 feathers coming in on the throat and breast. The example taken April 1, 

 however, is wholly in the plumage of the young in first autumn and shows 

 no signs of approaching moult. 



* 70- Chrysocantor aestiva aestiva (Gmel). 



Twenty-five specimens, both sexes, San Miguel and Saboga Islands, February 

 21 to April 13. Many of these are in the moult ; others, especially females, are 

 in much abraded plumage. 



71. Chrysocantor erithachorides (Baird). 



Seventy-three specimens, San Miguel and Saboga Islands, February, March, 

 and April. 



These skins do not differ from examples from Panama. The series shows a 

 considerable amount of individual variation, apart from that due to age. Sev- 

 eral adult males are intensely colored, with the under parts much suffused with 

 cadmium orange, the smaller wing coverts and yellow portion of the tail mostly 

 of this color, and with the colors of the head very intense ; others, apparently 

 quite as old, are much duller. The extent of the rufous chestnut of the head 

 varies from, in some skins, where it covers most of the chest to others where it 

 ends at the throat. The rufous chestnut streaks on breast and sides vary much, 

 in amount, in intensity of color, and in width. Some specimens have the back 

 streaked with rufous chestnut, while usually it is plain yellowish olive green. 

 In fact, it is difficult to pick out two skins quite alike. 



1 Cf. Oberliolser, Smitli. Mis. Collections, vol. 48, pp. 66-67, May 13, 1905, for 

 change of generic name nelmmthoj/hlln to Vermivora. 



