( 339 ) 



of the head, but the back is darker rafescent] brown, and wings and tail are 

 more like T. n. kuberi, though the coloration of these parts is rather variable. 



Wing 75—80 ; tail 58—63 mm. 



Obs. Specimens from the Orinoco (fonrteen examined) agree perfectly with the 

 typical series in the Vienna Mnsenm. 



{(1) T. nigrocinereus tschuclii Pelz. 



Tluimmphilus tsehmlii Pelzeln, /.c. pp. 76, 141 (1868.— Borba, Bio Madeira); Sclater, Cat. Birds 

 Brit. Afus. XV. p. 191 (Borba ; Iquitos, N. Peru). 



Hub. North Brazil : Borba, Rio Madeira (Natterer). North Pern : Iquitos 

 (H. Whitely), Nauta (Hauxwellj. 



c? ad. Differs from all the preceding races by having the whole back from the 

 forehead to the rump uniform black. White dorsal patch, wings and tail as in its 

 allies. The coloration of the under parts is rather variable, as shown by a series 

 from Borba in the Vienna Museum. Two have the throat only black, the rest of 

 the belly slate-grey, e.xactly as in T. ii. nigrocinereus, though the abdomen is slightly 

 darker ; in two others throat and foreneck are black, breast and abdomen sooty 

 blackish, while the fifth specimen has all the lower surface uniform deep black. 



Wing 79—82 ; tail 62—65 mm. 



? ad. Cap deep sooty black as in T. n. hnberi, but the sides of the head and 

 the throat are sooty blackish, the breast and abdomen dark rufous brown, wino-s 

 and tail considerably darker, and the back is chestnut-brown. 



Wing 75—77 ; tail 59—60 mm. 



Obs. An adult male from Nauta (Hauxwell coll., September 9, 1880; Mus. 

 H. V. Berlepsch) agrees well with those from Borba.] 



[202. Thamnophilus aethiops polionotus Pelz. 

 Cf. Nur. Znol. xiv. 1907. p. 369 (Humaytha). 



Left bank of the Rio Madeira : Humaytha (Hoffmanns).] 



203. Thamnophilus aethiops punctuliger Pelz. 



\ThammiMHs aethiops Solater, Proc. Zool. Soe. Lond. xxvi. 1858. p. 65 (1858.- Rio Napo, Eastern 



Ecuador).] 

 T. puiictidiger Pelzeln, Zur Oni. Bras. ii. p. 146 (1868.— Borba, Eio Madeira). 



No. 346. S ad., Calama, 7. viii. 1907.— Wing 76; tail 61 ; bill 19 mm. 



Nos. 106, 289, 333, 455. ? ?, Calama, 25. vi., 29. vii., 5, 26. viii. 10(i7.— Wing 

 72—76 ; tail .56—61 ; bill 18—19 mm. 



No. 792. ? ad., Allianca, 19. xi. 1907.— Wing 75 ; tail 58 ; bill 19 mm. 



No. 964. ¥ ad., Maruius, 30. vi. 1908.— Wing 73J ; tail 59 ; bill 18 mm. 



The adult male is identical with Pelzeln's type in the Vienna Museum. Both 

 have a distinct, concealed, white interscapular patch, and the lesser and luedian 

 ui)per wing-coverts conspicuously tipped with white, while those of the greater series 

 are either uniform dusky or show but slight traces of apical spots. 



The females, the first on record, are very similar to those of T. a. polionotus, 

 but the sides of the head as well as the throat are rather lighter ferrngiuous, and 

 the belly is somewhat paler. Some come very near T. a. incertus, while the 

 one from Maruius, the darkest of all, is scarcely distinguishable from polionotus. 



T. aethiops, T. juruanus, T. polionotus, T. punctuliger, and T. incertus are 



