152 bulletin: museum of comparative zoology. 



51. Elainea albivertex sordidata (Bangs). 

 Elainea sordidata Bangs, Auk, vol. 18, pp. 28-30, January, 1901. 



Fourteen adults, both sexes, San Miguel Island, February and March. 



It is claimed by Von Berlepsch and Hellmayr (Journ. f. Ornith. Januar-Heft, 

 1905, p. 2) that Elainea sororia Bangs from the Sierra Nevada de Santa Marta 

 is identical with E. albivertex Pelz. of Brazil. The bird of the Pearl Islands 

 seems a subspecies of this species, differing only in average characters. The 

 present series bears out the slight differences noticed in the original description 

 of E. sordidata— s\\^i\j shorter wing, tail, and tarsus, and longer and rather 

 broader bill; slightly duller and grayer upper parts, smaller white crown patch 

 and narrower wing bars. All these differences are, however, average char- 

 acters only, and the subspecies is not a very satisfactorily marked one. 

 Specimens from Panama City are troublesome; they are about the size of the 

 island examples, and differ from them only in having slightly smaller bills. It 

 is possible that sordidata is too slightly differentiated to stand even as a 

 subi^pecies. 



52. Sublegatus arenarum (Salv.). 



Nineteen adults, both sexes, San Miguel and Saboga Islands, February, 

 March, and April. 



53. Myiodynastes audax nobilis (Scl.). 



Four adults, both sexes, San Miguel, Saboga, and Pacheca Islands, March 

 and April. 



54. Myiobius naevius furfurosus, sub. sp. nov. 

 Myiobius naevius Bangs, Auk, vol. 18, p. 30, January, 1901 (nee. Bodd.). 



Three specimens, two adult females, one adult ^, Saboga Island, April. 



Tj/pe. — Coll. E. A. and O. Bangs, No. 14,397, adult 9 , Saboga Island, Bay 

 of Panama, April 9, 1904. 



Characters. — Similar to true 3f. naevius (Bodd.) of South America (type 

 from Guiana), but differing in being much more strongly buffy below, buff on 

 throat and breast and buff yellow on belly and under tail coverts; the breast 

 very much less distinctly striped with brownish ; upper parts rather paler — 

 about russet. 



From 3L crypterythrus Scl. of West Ecuador and 31. cryptoxajithus Scl. of 

 East Ecuador, the new form differs in its much paler brown back, though 

 agreeing with the former in having the breast indistinctly flammulated. 



