193 
June 10, 1851. 
John Gould, Esq., F.R.S., in the Chair. 
The following papers were read :— 
1. ON TWO NEW SPECIES OF BIRDS OF THE GENUS THNIOPTERA. 
By Puiure Lutruey Scrater, B.A., F.Z.S. etc. 
(Aves, Pl. XLI. XLII.) 
TZNIOPTERA ERYTHROPYGIA, Sclater. T. nigrescens ; vertice 
Sronte guldque canescente-griseis; maculd secundariorum albd ; 
uropygio, abdomine toto crissoque, cum tectricibus caude supe- 
rioribus et alarum inferioribus levitér brunneo-rufis ; rectricibus 
brunneo-rufis nigro terminatis ; rostro pedibusque nigris. 
Long. tot. 9 unc. 5 lin. ; alee, 5 unc. 7 lin. ; caudee, 4 unc. 4 lin. ; 
rostri 4 rictti, 1 unc. ; a fronte, 6 lin. 
Hab~ in republicé Equatoriana. 
Wings and interscapulars black, growing lighter towards the crown, 
and greyish white on front and throat; breast darkish grey ; outer 
web of the last four or five secondaries broadly edged with white, 
forming a white mark on the wing ; lower back and tail-coverts and 
whole body beneath below the breast, as also under wing-coverts, light 
brownish rufous; tail-feathers the same, but broadly tipped with black. 
For the loan of this and the following species I have to thank Mr. 
Edward Wilson, who received them from M. Verreaux of Paris. I 
was at first inclined to refer both species to the genus Agriornis of 
Mr. Gould, but having had through Mr. G. Gray’s kindness an op- 
portunity of examining the type of that form, Agriornis lividus* (Kit- 
litz), I now consider them better placed in the present genus Teni- 
optera, with which they agree in all their distinctive characters. 
TZNIOPTERA STRIATICOLLIS, Sclater. T. supra saturate fumoso- 
brunnea ; uropygio paululim rufescente tincto; superciliis ru- 
Fescente-albidis ; pennis cauddque nigris ; secundariis tertiartisque 
leviter brunnescente marginatis ; infra leviter brunneo-rufa ; gut- 
ture toto colloque albis nigro striatis ; rectricibus remigibusque 
brunneo-rufis nigro terminatis ; rostro pedibusque nigris. 
Long. tot. 9 unc. 5 lin. ; alee, 5 unc. 3 lin. ; caude, 4 unc. ; rostri a 
rictu, 1 unc. 4 lin.; a fronte, 74 lin. 
Hab. in republica Equatoriana. 
Above dark smoke-brown ; an obscure whitish line from the bill to 
the top of the eye; quill-feathers brown-rufous, outer margins and 
ends black ; secondaries, tertials, and wing-coverts nearly black, mar- 
gined with light brown; beneath brown-rufous ; chin, throat and 
neck white, with longitudinal striz of black ; tail-feathers brown- 
rufous, the two outer broadly tipped with black ; the rest have also 
the outer web black, except the two medial, which are wholly black. 
* Tyrannus gutturalis, Voy. de la Favorite, Ois. t. 11. 
No. CCXXXI.—Procerpines or THE ZOOLOGICAL SOCIETY. 
