248 P. L. Sclater on the 



interscapuliis subtus niveis ; tectricibus alarum apice albo 

 guttulatis ; Cauda brevi ; rostro plumbeo. 



Long, tota 5-5, aloa 3-0, caudae 1*8. 



$ subrufescenti-grisea ; alis runs ; fronte capitis lateribus 

 et corpore subtus pallide rufescenti-brunneis ; gutture clariore ; 

 lateribus griseo mixtis. 



Hab. Quixos in Cisandean Ecuador and Chamicurros, on 

 the Peruvian Amazon (Gould). 



I have seen several examples of this bird, of both sexes, 

 from the upper Peruvian Amazon and adjoining countries. 

 In the Paris Museum are specimens collected in those parts 

 by Messrs Castelnau and Deville in 1847 (No. 1121, Voy. 

 863). I have usually taken it to be the Thamnophilus stel- 

 laris of Spix, and used that appellation for it in my list of the 

 birds in Mr Gould's Rio Napo collection. Other authors, 

 however, have united Spix's name to the bird called Myiofhera 

 plumbea by Prince Maximilian of Neuwied, which belongs to 

 the genus Dysithamnus. Spix's somewhat loose description 

 and imperfect figure are nearly as applicable to one bird as 

 the other. His locality, Para, does not suit the present spe- 

 cies. I have thought it better, therefore, to avoid confusion 

 by giving this bird a new name. An examination of Spix's 

 type specimen in the Munich Museum, if still existing, will 

 decide whether I am right in doing so or not. 



Subdiv. D. OBSCURI. 



37. Thamnophilus (lesius, Sclater. 

 Lanius ccesius, Cuv., in Mus. Paris. Thamnophilus cwsius, 



Sclater, Pr. Z. S. 1855, (Jan. 23). 



$ nigro-plumbeus ; pileo cristato gulaque nigris ; tectricibus 

 alarum anguste albo limbatis ; cauda nigricante unicolore ; 

 rostro pedibusque nigris. 



$ grisescenti-brunnea, crista nigricante ; capitis lateribus, 

 tectricum alarum marginibus et corpore subtus runs ; rostro 

 nigro, mandibula inferiore basi et pedibus pallidis. 



Long, tota 5*5, alee 3-25, caudae 2-25. 



Hab. British Guiana. 



Two specimens of this bird in my possession were selected 



