I 



IX0BRTCHU3. 179 



112. Ixobrychus erytliromelas. 



CHESTXTTT-BACKEt) BlTTERV. 



IxohrycliKS erytliromelos fVieill), X. Diet. d'Hist. Xat. xiv. p. 422, 



1817 (Paraguar) ; Brabom-ne k Chubb. B. S. Amer. i. p. 52, 



no. 48o, 1912. 

 Ardetta erytliromelas Shai-pe, Cat. B. Brit. Mas. xxvi. p, 234 (Carimang 



Ptiver;, p. 2S4 rSavana;! 1S9S. 

 Ardetta exilis (nee Gmel.j, Sah-in, Ibis, 1SS6. p. 501 (Carimang 



River). 

 Ardetta involvcris (nee TieilL), Sharpe, Cat. B. Brit. Mus. xsvi. 



p. 284, 1898 (Savana). 



Adult male. Crown o£ head, back, and tail glo.'^sy greenish 

 black ; sides o£ face, hiud^neck, lesser upper wing-covertg 

 chestnut, the median ones ochreous brown, greater npper wing- 

 coverts and outer webs of innermost secondaries rich chestnut ; 

 bastard-Aving and primary-coverts blackish tipped with pale 

 chestnut; quills dark brown, outer edge o£ first primary rufous ; 

 throat white with a dark line of feathers down the middle ; 

 remainder of the under surface rufous-buff. 



Total length 260 mm,, culmen 4.5, wing 115, tail 42_, tar.sus 42, 

 middle toe and claw 41. 



The male described was collected on the Abary Paver in Sep- 

 tember 190(3. 



The female, which is also from the Abary River, differs from 

 the male in having the back chestnut instead of black and the 

 underparts paler. 



Young birds differ from the adult in having pale edgings to the 

 feathers of the upper parts. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Itaribisi Rivcrr, Abary River. Lamaha 

 (McConnell collection) ; Great Savannas (British Museum) ; 

 Kamarang River (Whitelg). 



Bxtralimital Range. Trinidad, Peru, Bolivia, Paraguav, South- 

 east Brazil, Panama. 



Habits. Unrecorded in British Guiana. 



K 2 



