APPENDIX. 353 



4. Myiarchus Oberi. "Sunset Bird." 



Male. Pileum*nape, and sides of the head dark umber-brown, 

 upper plumage dark olive-brown, upper tail-coverts edged with dull 

 ferruginous ; two middle tail-feathers blackish brown, the other feath- 

 ers are colored the same, except on the outer two-thirds of the inner 

 webs, where they are bright ferruginous ; outer web of lateral feather 

 and ends of .the others, ash color ; quills brownish black, the prima- 

 ries narrowly edged with dark ferruginous; the outer secondaries 

 are margined with very pale rufous, and the other secondaries with 

 pale yellowish white ; wing-coverts dark-brown, ending with pale 

 ashy tinged with rufous ; under wing-coverts pale, dull yellow, inner 

 margins of quills light salmon-color; lores, throat, upper part of 

 breast, and sides, clear bluish-gray, lower part of breast, abdomen, 

 and under tail-coverts, pale yellow ; bill and feet deep black. 



Length, 8| in. ; wing, 3^ ; tail, 3| ; tarsus, \ ; bill from front, }. 



The female does not differ in plumage from the male. 



Types in National Museum, Washington. 



Remarks. This is a large species, exceeding M. crinitus in 

 size ; the fourth quill is longest, the third and fifth nearly as long, 

 and equal ;-the bill is large and strong, and of a deep black through- 

 out ; the upper plumage is dark, much like that of M. tyranmclus, 

 but is even darker. 



In the collection are seven specimens. They agree closely in plu- 

 mage ; two only differ from the type in the dimensions of the wing, 

 one having it three and three-quarters, and the other four inches in 

 length. 



Mr. E. C. Taylor (Ibis, 1864) records a species of Myiarchus from 

 Dominica, which was for a good while undetermined. In a List of 

 Birds from St. Lucia, given by Mr. Sclater (P. Z. S., 1871, p. 271), he 

 refers it to M. erythrocercus. 



I have a specimen of this species from BaTiia (verified by Mr. Scla- 

 ter) ; on comparison I find the two birds to differ very decidedly. 



M. erythrocercus is smaller ; above it is of a lighter brown, more 

 ochreous, especially on the crown ; the bill is weaker and more 

 depressed ; they are somewhat alike in the coloration of the tail- 

 feathers, but the line of contact of the two colors is more decided 

 in M. Oberi. 



I do not determine that this is the same as the species obtained 

 by Mr. Taylor ; possibly the two forms may exist in Dominica. 



I have named this species in compliment to Mr. Fred. A. Ober, 

 who has so industriously worked up the avifauna of Dominica. 



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