CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 



2I 5 



. With pale tips to wing-coverts forming 

 wing-bands. 



o. Wing less than 55 mm 



o'. Wing more than 55 mm. 



p. Centre of abdomen bright sulphur 

 yellow crown patch large bordered 

 laterally with black or blackish 



p'. Centre of abdomen pale primrose 



yellow or pale yellowish white. 

 q. Feathers of crown elongated, form- 

 ing a crest 



q'. Feathers of crown not elongated 

 into a crest. 



r. Centre of belly whitish 



r'. Centre of belly pale primrose 

 yellow 



n'. No wing-bands 



m'. Wing more than 80 mm. 



n. Throat nearly uniform yellow with breast 

 n'. Throat grey not uniform with breast. 



o. Crown patch orange yellow 



o'. Crown patch scarlet (bordered with 

 orange) 



/'. No concealed or partially concealed crown 



patch. 

 m. Outer webs of outer rectrices pale dirty 



whitish or pale yellowish. 

 n. Above greyish olive brown; below, throat 

 greyish white, belly pale primrose yellow. 

 n'. Above dusky olive, below sulphur yel- 

 low with a buffy wash on the breast 



m'. 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) 



p'. Smaller; tail less than wing 



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

 dusky not in sharp contrast with olive 

 greenish back. 



p. Abdomen bright tawny olive 



p'. Abdomen not tawny olive. 



q. Throat distinctly grey rather than 



yellow or olive yellow 



q'. Throat yellow or yellowish olive. 

 r. A distinct yellow or yellowish 



superciliary streak 



r'. No superciliary stripe. 



s. Throat and breast olive 



yellow. 



/. Mandible blackish horn- 

 color, whitish at base only. . 



t'. Mandible nearly uniform 

 from tip to base (pale dusky 

 horn-color.) 

 . Darker, pileum and hind 



neck deep slate color Khynchoc 



Tyrannulus elatus. 



Myiopagis gaimardi gaimar- 



I Elaenia martinica flavogaslra. 

 \Elaenia cristata. 



Elaenia albiceps parvirostris. 



Elaenia chiriquensis chiriquen- 



sis. 

 Myiopagis viridicata viridicata 



Machelornis rixosa flavigularis 

 Tyrannopsis sulphureus. 



Tyrannus melancholicus satra- 

 Pa. 



Xenopsaris albinucha. ' 

 Inezia caudala. 



Leptopoton superciliaris. 

 Todiroslrum schistaceiceps. 



Pipromorpha oleagineus olea- 

 gineus. 



Pipromorpha oleagineus palli- 

 diventris. 



Ornithion pusillum napaeum. 

 Capsiempis fiaveola. 



Rhynchocydus sulphurescens 

 klagesi. 



u'. Paler, pileum and hind- 

 neck slate grey 



s'. Throat and breast chrome or 

 lemon yellow with a faint 

 ochraceous wash 



n'. Not bright olive green above. 



hocyclus 

 milis. 



sulphurescens 



Rhynchocydus sulphurescens 

 sulphurescens. 



Rhynchocydus flaviventris fla- 

 viventris. 



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



