200 FORMICAETIDJ^. 



outer web of the outer rcctrix : beneath cinereous, rather more 

 whitish on the middle of tlie belly ; under wing-covcrts and inner 

 margins of wing-feathers white ; bill and feet black : whole length 

 5-7 inches, wing 2-7, tail '2-'2. Female similar, but nape dark chestnut, 

 and front black with slight white points. 



Jlah. Roraima district of Guiana. 



The male of this species is again very similar to Th. ncevius in 

 general colour, but the female is quite distinct. 



a, b. J ad. ; c. Eoraima, Brit. Guiana {Whitely). Salviu-Godman Coll. 

 2 ad. sk. (Types of the species.) 



d. 5 ad. sk. Eoraima, Brit. Guiana ( Whitely). Sclater Coll. 



33. Thamnophilus cserulescens, 



Batara negro y aplomado, Azara, Apimi. ii. p. 199. 



Thamnophilus caeruleseens, Vieill. Noiiv. Diet. in. p. 311; id. Enc. 



Meth. p. 743 (S); Scl. Cat. A. B. p. 174; Scl. et Salv. Nomencl. 



p. 70; Salv. Ibis, 1880, p. 360 (rep. Arg.) ; White, P. Z. S. 1882, 



p. 614 (rep. Arg.) ; Bed. J.f. O. 1887, p. 119 (Paraguay) ; Scl. et 



Huds. Arij. Orn. i. p. 204. 

 Thamnnpbilus auratus, Vieill. Nouv. Diet. iii. p. 312 ; id. Enc. Meth. 



p. 743(5). 

 Thamnopiiilus pileatus, Scl. Edinb. Phil. Journ. n. s. i. p. 245 ( cJ ) ; 



id. P. Z. S. 1858, p. 213 ; Bunn. Syst. Ueb. iii. p. 95. 

 Thamnophilus maculatus, Lafr. Bev. Zool. 1853, p. 339 ; Sclater, 



Edinb. Phil. Journ. n. s. i. p. 246 ( $ ). 

 Thamnophilus ventralis, Sclater, Edinb. Phil. Journ. n. s. i. p. 244 



Erionotus caeruleseens, Cab. et Hem. Mm. Hein. ii. p. 15. 



Above cinereous ; cap and nape black ; interscapulium with a 

 white basal spot and mixed with black ; wings black, edged with 

 white ; upper tail-coverts black, with slight white terminal spots ; 

 tail black, broadly tipped with white, and with a broad white bar 

 on the outer rectrix, which is sometimes confluent with the white 

 tip : beneath cinereous, middle of belly and crissum white ; biU 

 and feet blackish : whole length 5-7 inches, wing 2-8, tail 2-5. 

 Female similar, but fulvous-brown above, and markings less distinct : 

 beneath deep fulvous, paler on the throat. 



Hah. Paraguay, Uruguay, and Argentina. 



This is the most southern representative of the group of Th. ncevius. 

 It may be known by the greater extent of the white bar on the 

 outer rcctrix, and the white belly of the adult male. 



a. 5 ad. sk. Uruguay. Alan Peel [C.J. 



b,c.(S2- fid. sk. S.E. Brazil. Sclater Coll. 



d, e. (5" 2 ad. sk. Misiones, Arg. Eep. ( White). Sclater Coll. 



/. 2 ad. sk. Buenos Ayres. II. Durnford [C.l. 



g, h. S ad. sk. Salta, Arg. Eep. II. Durnford [CJ. 



