Genus Thamnophilus, Vieillot. 249 



from 'a large collection of birds from British Guiana which 

 contained many similar. The examples in the Paris Museum, 

 the only other place where I have met with this species, are 

 marked Lanius ccesius, Cuv., which is, I believe, merely a MS. 

 name. 



38. Thamnophilus schistaceus, d'Orb. 

 Thamnophilus fuliginosus, Lafr. et d'Orb., Syn. Av. in Mag. 



de Zool., 1837, p. 10 ; d'Orb, Voy., pi. 5, fig. 1. Th. schis- 

 taceus, d'Orb. Voy., p. 170. 

 $ " totus schistaceus, obscurus ; subtus pallidior ; rectricibus 



lateralibus albescente limbatis ; rostro pedibusque cseruleis." 

 " Long. 6 poll" (Lafr.) 



Hab. Bolivia, Cochabamba (d'Orb.) ; New Grenada (Lafr.) 

 One specimen of a bird which I refer to this species is in 



the British Museum. 



39. Thamnophilus immaculatus, Lafr. 

 Thamnophilus immaculatus, Lafr. Rev. Z. 1845, p. 340. Th. 



campterii, Gray's Gen., iii. ; App. p. 14. 



J ater ; summi pennis quibusdam niveis. 



Long, tota 6*5, alse 3-3, caudse 3*0. 



$ brunneo-cinnamomea ; fronte loris gutture genis cau- 

 daque tota nigro ardesiacis ; rostro pedibusque nigris man- 

 dibula albicante (Lafr.) 



I have a male specimen of this bird sent to me by the MM. 

 Verreaux. M. de Lafresnaye does not mention the white 

 feathers at the upper end of the carpal joint ; but the wings 

 in Bogota skins are so squeezed up into the body that this 

 slight white patch is very likely to escape notice, and I have 

 little doubt that the birds are identical. 



