Genus Thamnophilus, Vieillot. 229 



Guiana, and in the valley of the Amazons, where the elevations 

 are not great. 



There is in my opinion no sufficient difference in the struc- 

 ture of the 39 birds described in the present paper, to necessi- 

 tate their separation into smaller groups, and I have therefore 

 merely placed the subgeneric names that have been proposed 

 at the head of the several sections, and retained Thamnophilus 

 as a generic name throughout. 



The measurements of each species are given in inches and 

 decimal parts. I have been particular in obtaining as many 

 accurate localities as possible for each species, an important 

 point this, which has been too much neglected in ornithology, 

 and have always added the authorities for the localities. 



Div. A. BATABA, Lesson. Maximi : caudd longd : rostro 



fortiore. 



1. Thamnophilus cikereus, Vieill. 

 ThamnopJiilus cinereus, Vieill. Nouv. Diet. d'H.N. xxxv. p. 200. 



($) 1819. Th. rufus, Vieill. ib. (?). Th. undulatus, Gray's 



Gen., i. p. 297 ; Bp. Consp., p. 197. Th. vigorsi, Such. Zool. 



Journ., i. p. 557, pi. 7 (£), 8 ($), 1825. Th. gigas, Sw. Class. 



Birds, ii. p. 220. Th. procerus, Licht. 

 Lanius undulatus, Mikan. Del. Fl. et Faun. Bras., pi. 2. 1820. 



L. procerus, Licht. in Mus. Berol. 

 Vanga striata, Q. and G. Voy. de l'Uran. Ois., i. p. 98. pi. 



18 (5), 19 (?). 1824. 

 Batara striata, Less. Tr. d'Orn. p. 347. 



J cinereus ; pileo cristato nigro ; dorso, alis caudaque nigris, 

 albo trans-fasciatis. 



$ pileo antice castaneo ; fasciis ferrugineis neque albis ; 

 subtus albo-cinerea, ventre brunnescente. 



Long, tota 14*0, alae 5-0, caudse 7 # 0. 



Hab. South-east Brazil, San Joan del Rey, and S. Paolo 

 (Mus. Berol.) ; Minas Geraes (Such.) ; Bio Grande do Sul 

 (Plant.) 



I regret we have no information of the habits of this spe- 

 cies, the finest and largest of the whole group. It appears 

 to have been one of the many novelties discovered in Brazil 



