( 340) 



evidently geographical races of the same " Formenkreis." The males differ from 

 eacli other only in intensity of coloration and in the amount of white spotting, and 

 the females are even less different. 



Their ranges and characters may be summarized as follows : — 



(a) T. aethiops aetliiops Scl. 



Thaniiiophilus aethiops Sclater, P. Z. S. £o»kI xxvi. p. C5 (1858. — Rio Napo, Ea<tern Ecuador); 

 I.e. p. 457 (Zamora) : Cat. Birds Brit. Mas. xr. p. 190 (Eastern Ecuador) ; Salvador! & Feata, 

 Boll. Miis. Torino xiv. No. 362. 1899. p. 27 (Zamora) ; Goodfellow, Ibis 1902. p. G4 (Coca, Rio 

 Napo). 



Ha6. Eastern Ecuador : Coca, Upper Napo (Goodfellow), Saraya?a (Bnckley), 

 Zamora (Fraser, Festa). 



cJ ad. Deep black with slight gloss ; bend and edge of the wing and nnder 

 wing-coverts speckled with white. 



Wing 74 ; tail 60 mm. 



? ad. Upper parts deep chestnnt-brovvn ; rectrices blackish edged with deep 

 chestnut. Sides of head like the back, under parts somewhat lighter chestnut. 

 Axillaries orange, quill-lining pale rufous buff. 



Wing 74 — 76 ; tail 60 — 64 mm. 



(b) T. aethiops polionotua Pelz. 



T. poUonoUis PeUelo, Zur Oni. Bras. ii. p. 147 (1868. — Marabitanas, Barcellos, Rio Negro). 



T. tri^tis Sclater & Salvia, Nomencl. Av. Neotrop.p. 160(1873. — Oyapoc, Cayenne) ; Hellmayr, Xov- 



Zool. xiii. 1906. p. 338 (orit.). 

 T. sp. iiic. Berlepsch & Hartert, Nor. Zool. ix. 1902. p. 69 (La Pricion, Nicare, Venezuela). 



Hab. Venezuela : Nicare, La Pricion, Ganra River. French Guiana : Oyapoc. 

 North Brazil : Marabitanas, Barcellos, on the Rio Negro (Natterer), Hnmaytha, left 

 bank of Madeira (Hoffmanns). 



c? ad. General colour plumbeous, cap blackish ; bend of the wing spotted with 

 white, all the upper wing-coverts with well-defined white apical spots. 



Wing 73—76 ; tail 59—61 mm. 



¥ ad. General colour paler, more rufous brown than in T. a. aethiops, and tail 

 also rufous brown (instead of blackish). 



Wing 72 — 75; tail 58—64 mm. 



Obs. For synonymy cf. Nov. Zool. xiii. pp. 338-9. The male from Humaytha 

 is slightly paler plumbeous than those from Marabitanas, Oyapoc, and Caura, but 

 does not otherwise differ. 



(c) T. aethiops jitruanus Ihering. 



Tliumitojihilus jitrimuiii Iheriag, Rev. Mas. Paul. vi. I'JOt. p. 439. pi. xvi. fig. 1 (1905. — Rio Juru4) ; 

 Snethlage, Jouni.f. Orn. 1908. p. 15 (Monte Verde, Rio Puriis). 



Hab. West Brazil : Rio Jnrnil (Garbe) ; Monte Verde, on the River Puriia 

 (Snethlage). 



S ad. Exactly like the jireceding form, but median and greater wing-coverts 

 uniform blackish (not tipped with white), and general coloration rather clearer 

 plumbeous. 



Wing 75—79 ; tail 61—63 mm. 



?. Unknown. 



Obs. T. a. jitruanus has, like T. a. polionotus, the cap blackish, small white 



