cherrie;: ornithology of the Orinoco region. 21 ■ 



n. With pale tips to wing-coverts forming 

 wing-bands. 



o. Wing less than 55 mm Tyrannulus elatus. 



o'. Wing more than 55 mm. 



p. Centre of abdomen bright sulphur 

 yellow — crown patch large bordered 



laterally with black or blackish Myiopagis gaimardi gaimar- 



di. 

 p'. Centre of abdomen pale primrose 

 yellow or pale yellowish white. 

 q. Feathers of crown elongated, form- lElaenia martinica flavogastra. 



ing a crest (Elaenia crislata. 



q'. Feathers of crown not elongated 

 into a crest. 



r. Centre of belly whitish Elaenia albiceps parvirostris. 



r'. Centre of belly pale primrose 



yellow Elaenia chiriquensis chiriquen- 



sis. 



n'. No wing-bands Myiopagis viridicata viridicata 



>n'. Wing more than 80 mm. 

 n. Throat nearlj- uniform yellow with breast Machelornis rixosa flavignlaris 

 n'. Throat grey — not uniform with breast. 



o. Crown patch orange yellow Tyrannopsis sulphureus. 



o'. Crown patch scarlet (bordered with 



orange) Tyrannus melancholicus salra- 



pa. 

 No concealed or partially concealed crown 

 patch. 



n. Outer webs of outer rectrioes pale dirty 

 whitish or pale yellowish. 

 n. Above greyish olive brown; below, throat 



greyish white, belly pale primrose yellow. Xenopsaris albinucha. ' 

 n'. Above dusky olive, below sulphur yel- 

 low with a buffy wash on the breast Inezia caudala. 



n'. Outer webs of outer rectrices not con- 

 spicuously lighter colored than the inner 

 webs. 

 n. Bright olive green above. 



o. Pileum slate grey in marked contrast 

 with olive green of back. 

 p. Larger; tail about equal to wing 



(Trinidad) Leptopo^on superciliaris. 



p'. Smaller; tail less than wing Todiroslrum schislaceiceps. 



o'. Pileum not slate grey, or if grey or 

 dusky not in sharp contrast with olive 

 greenish back. 



[Pipromorpha oleagineus olea- 



p. Abdomen bright tawny olive i _ S'neus. . 



1 Ftpromarpha oleagineus pallt- 

 [ diventris. 

 p'. Abdomen not tawny olive. 



q. Throat distinctly grey rather than 



yellow or olive yellow Ornilhion pusillum napaeum. 



q'. Throat yellow or yellowish olive, 

 r. A distinct yellow or yellowish 



superciliary streak Capsiempis flaveola. 



r' . No superciliary stripe. 



s. Throat and breast olive ^ 



yellow. 

 I. Mandible blackish horn- 

 color, whitish at base only. . Rhynchocyclus sulphurescens 

 klagesi. 

 I'. Mandible nearly uniform 

 from tip to base (pale dusky 

 horn-color.) 

 u. Darker, pileum and hind 



neck deep slate color .... Rhynchocyclus sulphurescens 

 assimilis. 

 u'. Paler, pileum and hind- 

 neck slate grey RJiynchocyclus sulphurescens 



sulphurescens. 

 s'. Throat and breast chrome or 

 lemon yellow with a faint 



ochraceous wash Rhynchocyclus flavivenlris fla- 



viventris. 

 n'. Not bright olive green above. 



'This is out of place here, as Xenopsaris belongs with the Cotingidae. 



