SCLATERIA. 57 



The male from which the description is taken was collected on 

 the Kainakabra River in 1911. 



Adah female. Differs entirely from the adult male in being 

 dark chocolate-brown above, instead of slate-colour, the upper 

 wing-coverts tipped with fulvous, instead of white, and the under 

 surface rust-brown lined with white, instead of slate-colour with 

 white lines. Wing 68 mm. 



The female bird described was collected on the Ituribisi River 

 in 1909. 



The young male bird in its first plumage is like the adult 

 female, though somewhat darker perhaps, and has the fulvous tips 

 to the upper wing-coverts. As it advances in age, however, these 

 tips change to white, first on the major series; this change appears 

 to be one of the first signs that denotes the sex, and the slate-colour 

 of the adult plumage may be seen approaching in patches on the 

 back and sides of the neck. The immature bird mentioned was 

 collected on the Mazaruni River in October 1907. 



Breeding-season. Unknown in British Guiana. 



JVest. Unrecorded in British Guiana. 



E[igs. Und escribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Bartica, Kainakabra River, Bonasika River, Makauria River, 

 Abary River, Mazaruni River, Arawai WiyeviMcConnell collection)', 

 Kaniakusa ( Wliitely). 



E.vtralimital Range. Surinam (^Gmelin, Penard). 



Habits. Schomburgk states (Reis. Guian. iii. p. 685) that he 

 met with this bird only in the woods near the coast, where it ran 

 about on the o-round amonfj the low bushes. 



384. Sclateria leucostigma. 



8pOT- WINGED AnT-CkEEPER. 



Pcrcnoslola leucoaiujma Pelz. Orn. Bras. pp. 8G, 180, 18G9 (Barra do 



Kio Negi-o). 

 Heterocnemis leiicoslif/ma Salvin, Ibis, 18S5, p, 427 (Bartica Grove, 



Camacusa, Merunie Mts.) ; Sclater, Cat. B. Brit. Mus. xv. p. 276, 



1890 (Takutu River, Camacusa, Bartica Grove). 

 Sclateria lencostiqma Brabourne & Chubb, B. S. Amer. i. p. 209, 



no. 2098, 1912. 



Adult male. General colour above blackish tinged with slate- 

 colour, iuchiding the head, back, and tail; up]ier wing-coverts 

 black, each with a .small white spot at the tip; primary and 



