174 MESSRS. SCLATER AND SALVIN ON PERUVIAN BIRDS. [Feb. 27, 



its elongated and much attenuated bill, and in its longer and more 



Fig. 1. 



graduated tail. 



Xenospingiis concolor. 



The sexes may be diagnosed as follows : — 



5 . Cinereus : subtus dilutior, magis albicans : fronts et loris 

 nigris : rostro et pedibus Jlavis : long, tota 6'0, alcB 28, caudte 

 rectr. med. 2"9, later. 2"5, rostri a rietu 06, tarsi 0'95. 



$ . Fuscescenti-cinerea, subtus valde dilutior, fere albicans, obso- 

 lete fusco striata: rostro et pedibus fuscis. 



D'Orbigny obtained a single specimen of this species in the valley 

 of Arica. Mr. Whitely has sent us six examples from the more nor- 

 thern valley of Tamho. 



.5. Elainea albiceps. 



Muscipeta albiceps, Lafr. et d'Orb. Syn. Av. i. p. 47 ; d'Orb. 

 Voy. Ois. p. 319. 



This bird, from the locality, we have little hesitation in referring 

 to the present species. Sclater's E. albiceps. Cat. A. B. p. 217. 

 sp. 1325 (from Ecuador) is of larger size, and probably distinct. 

 D'Orbigny procured this bird at Tacna. 



6. Myiobius rufescens, Salvadori. 



M. rufescens, Salvadori, Atti Soc. It. vii. p. 152(1864). 



M. nationi, Sclater, P. Z. S. 1866, p. 99, t. xi. fig. 1. 



Dr. Salvadori having most kindly sent over the types of the Ame- 

 rican species described in his recent papers in the seventh and eighth 

 volumes of the ' Atti della Societa Italiana di Scienze Naturali ' for 



