Mr. P. L. Sclater on Elainea Riisii. 439 
medial rectrices, which have nearly the ordinary normal form, by 
nearly half an inch. In P. filicauda, as is well known, the rectrices 
are nearly of equal length, and terminate in a long hair-like filament. 
Further differences from Pipra filicauda are observable in the crim- 
son colour descending lower down the back above, and pervading the 
breast and upper part of the belly. In the latter respect this species 
approaches to P. aureola and its scarcely separable ally, P. flavicollis 
of the Rio Negro, an example of which was in the same collection. 
I propose to call this Manakin 
PIpRA HETEROCERCA, Sp. nov. 
Velutino-nigra: dorso superiore pileoque toto cum nucha coc- 
cineis : fronte, ciliis oculorum et corpore subtus flavis, pectore 
coccineo perfuso : tectricibus subalaribus et macula in pogonio 
interiore remigum albis: caude rectricibus lateralibus elon- 
gatis, acuminatis, medias valde excedentibus : rostro plumbeo : 
pedibus obscure carneis. 
Long. tota 4-25, ale 2°5, caude rectricum lateralium 1°75, me- 
diarum 1°3. 
Hab. In ripis fl. Amazonum sup. 
Obs. Affinis P. filicaude et P. aureole, sed caude forma primo 
visu distinguenda. 
Description or A New TYRANT-BIRD OF THE GENUS ELAINEA, 
FROM THE IsLAND oF Saint THomas, West Inpies. By 
Puitie Lurtey Scrarer, M.A., Secretary TO THE So- 
CIETY. 
Mr. Osbert Salvin landed at St. Thomas for a few hours on his 
way out to Guatemala in the spring of last year, and with charac- 
teristic energy took out his gun fora ramble. The first shot fired 
secured two examples of a bird not previously known as an inhabitant 
of this island*, and, I believe, new to science—a species of Tyrant- 
bird of the genus Elaineat. Mr. Riise, so well known for his col- 
lections in different branches of Natural History made in this island, 
having had his attention drawn to the existence of this bird by Mr. 
A. Newton, caused a search to be made, and obtained six other spe- 
cimens, which I now exhibit. It is to this gentleman that I propose 
to dedicate this species, in commemoration of his exertions in con- 
firming Mr. Salvin’s discovery, by the name of 
Exarnea Rusti, sp. nov. 
Fuscescenti-olivacea : pileo cristato intus albo: loris albescen- 
tibus : alis nigricantibus, primariis olivaceo stricte, secundariis 
et tectricibus flavicanti-albo latius marginatis: cauda nigri- 
canti-fusca, marginibus externis olivacescentibus: subtus cine- 
* See Messrs. A. and E. Newton’s articles on the Birds of St. Croix and St. 
Thomas in the ‘ Ibis,’ 1859, pp. 59, 138, 252, 365. 
+ This genus of Sundevall has been written in many different ways (sc. Elenia, 
Elainia, &c.); but the proper orthography is certainly Elainea, from é\divos or 
éXaiveos, oleagineus. 
