156 MESSES. SCLATER AND SALVIN ON [Mar. 2, 



Obs. Species affinis N. ruflcipiti et N. sordida, sed colore uniforrai 

 insignis. 



Mr. Buckley obtained but a single example of this Nemosia, which 

 appears to be' a very distinct species of the section TMypopsis. 

 The wings are rather short, the third and fourth primaries, which 

 are equal and longest, slightly exceeding the second and fifth. The 

 tail is rather rounded ; the tail-feathers are slightly pointed at their 

 extremities. 



Fam. Tyrannid^. 



3. Platyrhynchus senex, sp. nov. 

 Brunnescenti-olivaceus, uropygii plumis et tectricum majorum mar- 



ginibus rufescentibus ; pileo nigricante, crista mediali semicelata 

 alba ; subtus saturate Jlavicanti-fulms, gula alba ; subalarihus 

 ventre concoloribus ; remigibus et rectricibus nigris brunnescenti- 

 olivaceo extus limb at is ; rostro superiore nigro^inferiore Jlavido ; 

 pedibus albis : long, tota 4, alee 25, caudce TS, rostri a rictu 

 0-7, tarsi 0-6. 



Hab. Sarayacu, Ecuador {Buckley). 



Mus. S.-G. 



Obs. Species PI. rostrato proxima et ejusdem formse, sed crassitie 

 minore et pileo nigricante necnon ventre saturatiore distinguenda. 



4. Serphophaga albogrisea, sp. nov. 



Supra grisea, alis et cauda nigricantibus ; macula celata verticali, 



tectricibus alarum et secundariis extus latissime albis ; loris et 



corpore subtus albis, hypochondriis vix griseo tinctis ; rostro et 



pedibus plumbeis : long, tota 4"2, alcB 2-6, cauda 2'3, tarsi 0"75. 



Hab. Sarayacu, Ecuador {Buckley). 



Mus. S.-G. 



Obs. S. cinerece affinis, sed pileo dorso concolori et alis latissime 

 albo marginatis distinguenda. 



The beak of the single specimen in Mr. Buckley's collection is 

 unfortunately defective, but enough is left to show that the species 

 belongs to the genus Serphophaga, its nearest ally being the bird 

 with which we have compared it. 



5. Syristes albocinereus, sp. nov. 



Tyrannus, sp. ?, Scl. & Salv. P. Z. S. 1865, p. 189. 



Sirystes albogriseus, Scl. & Salv. P. Z. S. 1873, p. 280 (nee 

 Lawrence). 



Supra griseus ; capitis lateribus alis et cauda fusco-nigricantibus, 

 secundariis extus albo limbatis ; capite summo nigerrimo ; dorso 

 postico, uropygio et corpore tota subtus albis; rostro et 

 pedibus nigris: long, tota 7, alee 3'9, cauda 3*3, rostri a 

 ri(tu ri, tarsi 0'9. 



Hab. Amazon, sup. {Bartlett, WhiteJy); Sarayacu, Ecuador 

 (Buckley); Co\umh\& {Mus. P. L. S.). 



Mus. S.-G. etP.L.S. 



