832 MR. P. L. SCLATER ON NEW TYRANNID#. [Dec. 6, 
et ventre medio cum crisso flavido indutis: rostro pallide 
corneo, mandibula albicantiore, pedibus fuscis : long. tota 7°5, 
ale 3°7, caude 3°1, tarsi 0°8, poll. Angl. 
Hab. Respubl. Aquator. in ripis fl. Napo. 
Obs. Sp. crassitie majore et pilei plumis late albis ab Z. pagana, 
cui forma similis, distincta. 

Elainea gigas. 
I formerly referred this Elainea to the Muscipeta albiceps of 
Lafr. et D’Orb., but discovered my error on obtaining specimens of 
the latter bird from Eastern Peru (see P. Z. S. 1868, p. 174). #. 
gigas, as I now propose to call it, is the largest species of the genus 
that I am acquainted with, slightly exceeding in size even E. obscura. 
It is not unlike the latter species generally, but has a large and 
conspicuous white crest, the feathers of which are margined with the 
colour of the head. 
2. ELAINEA FALLAX, sp. nov. (Fig. 2, p. 833.) 
Elainea, sp. ex Jamaica, Sclater, P. Z. 8S. 1860, p. 314. 
E. fallax, Sclater, P. Z. S. 1861, p.407, et Cat. Am. B. p. 217 
(deser. nulla! ). 
Supra obscure olivacea, capite nigricantiore, pilet medii plumis 
ad basin albis: alis extus nigricantibus, tectricibus albo 
terminatis, secundariis hoc colore extus marginatis ; primariis 
extus olivaceo anguste fimbriatis: cauda fusca, rectricibus 
extus olivaceo anguste fimbriatis: subtus pallide flavida, sub- 
alaribus flavidis, remigum marginibus internis albescentibus : 
