278 



Chekkie, List of Birds of Sa>i yos<' . Cosia Rica. [July 



In a series of 25 Black-and-white Warblers before me, almost all are 

 birds of the year. There is not one in fullj adult plumage and manj are 

 decidedly buffj on crissum and sides. 



S. Protonotaria citrea. — No fall migrants were noted. 



9. Helminthohila peregrina. Recorded the first this fall, October 20. 

 In a series of 15 Tennessee Warblers, taken from the beginning of Septem- 

 ber to the beginning of March, there is not one that is not more or less 

 strongly tinged with greenish 3'ellow, very different from the breeding 

 bird found in the United States. 



10. Helminthophila chrysoptera. — The first noted this year, a female, 

 taken October 2, is a rather abnormal bird, being as brightly colored as 

 any spring male. Birds taken here have usually more or less olive green 

 shading on the buck. 



11. Helmitherus vermivorus. — November 23, 1S90, I took a fine male 

 specimen, the first and only Worm-eating Warbler I have taken in Costa 

 Rica. 



12. Dendroica virens — The Black-throated Green Warbler may, I 

 think, be considered as rather a rare bird in Costa Rica, there being only 

 three Costa Rican examples in the Museo Nacional. These three, al- 

 though the sex is not indicated on the labels, are evidently females, hav- 

 ing the throat yellow and the black of the breast with whitish tips to 

 the feathers. I have not myself met with this bird. 



13. Dendroica coronata. — There are only two Yellow-rumped Warblers 

 in the Museum collection. A male taken Feb. 15, 1S89, is similar to an 

 adult female from the vicinity of Washington, D. C, but has a tiiangular 

 ashy blue patch with black streaks in the centre of the back. There are 

 a few black feathers in the auriculars, and a few scattered in the sides of 

 the crown. Below the yellow of the sides of the breast is very pale. The 

 white throat is tinged with light buffy brownish. There are only a few 

 black feathers in the breast (these are tipped with white), and a few with 

 black shaft streaks. 



14. Dendroica blackburniae. — P'irst arrivals were noted August 17, 

 1890, and the second August 20, from which time they were common 

 until the first of October, when they were very abundant and remained 

 so until the 7th, when all disappeared. The first arrivals were nearly a 

 month earlier than in the fall of 1S89. 



In a series of 50 Blackburnian Warblers taken chiefly in the vicinity of 

 San Jose there is not one in adult plumage. Perhaps the brightest bird 

 in the collection is a female, taken by tiie author October 3, 1S90, with 

 throat and breast rich cadmium orange, but the white wing-patch is re- 

 placed by the two wing-bars of the young bird, and there is considerable 

 grayish brown in the upper plumage. While there are a few males and 

 females like the one described above, the bulk are very much paler, rang- 

 ing from the bright cadmium orange to a pale yellowish buft'on the throat 

 and the breast, with the crown patch almostobsolete, the back and streaks 

 on the sides dusky brownish. 



15. Dendroica pennsylvanica. — In a series of 40 Chestnut-sided War- 



