262 MR. P. L. SCLATER ON SOME NEW OR 
names are not to be employed in a binominal system of nomenclature. Nor is it proper 
to adopt Illiger’s MS. term ‘‘ longipes,”’ as proposed in Prince Bonaparte’s ‘ Conspectus,’ 
while there are many other names for this bird already published. So the earliest specific 
name available seems to be Shaw’s zonurus (Falco zonurus, Shaw’s Zool. vii. p. 62), and 
this species should stand as Urubitinga zonura. It appears to have an extensive range, 
extending from Paraguay, all over Bolivia, Peru, Brazil, Guiana and New Granada into 
Southern Mexico, where specimens were obtained by M. Sallé (see Proc. Zool. Soc. 1857, 
p. 227). 
The second allied species of Urubitinga is the ‘‘ Falco anthracinus, Licht. in Mus. 
Berol.,’”’ under which name it is described by Nitzsch in a note to his ‘ Pterylographie ’ 
(p. 83). This is the same as Du Bus’s Morphnus mevicanus (Bull. Ac. Brux. 1847). See 
M. de Lafresnaye’s observations in the ‘ Revue Zoologique’ for 1848 (p. 240), where he 
clearly points out the differences between this bird and the Urubitinga zonura. The 
Urubitinga anthracina inhabits the northern portion of South America, Guiana’ and 
New Granada?, Guatemala and Southern Mexico’, where MM. Botteri and Sallé both 
procured it, and M. DuBus’s types were collected. The third species is Urubitinga 
schistacea as characterized above, which is distinguishable at once from the preceding 
by its inferior size and narrower tail-band. The following diagnoses are sufficient to 
point out the differences between these three species* :— 
1. U.zonura. Major, caude dimidio basali et margine apicali albis. 
2. U. anthracina. Media, caude fascia lata et margine apicali albis. 
3. U.schistacea. Minor, caude fascia angusta et margine apicali albis. 
Such are these birds in their adult plumage: in their immaturity they are quite 
different. Ihave not yet seen the young of U. schistacea, as I now think the specimen in 
one of Sallé’s Mexican collections called Morphnus schistaceus, juv. (Proc. Zool. Soc. 1857, 
p- 227), does not really belong here ; but the other two species in their immature state 
are both irregularly flammulated on the lower surface and back, and have numerous 
buffy-white cross-bars on the tail and under tail-coverts. Specimens of U. zonura in 
this state are in the British Museum, and we have a fine example of a similar bird now 
alive in our Gardens. 
I have hitherto used for these birds the generic term Morphnus, following Mr. Gray 
and other writers; but on considering that the true type of Morphnus is the Falco 
guianensis of Daudin—a bird of different structure, and more nearly allied to Thrasaétus, 
I think they stand better disconnected. But the Falco unicinctus of Temminck and 
Falco meridionalis of Latham—two allied species, for which Kaup’s term Spizigeranus 
' Schomburgk, Reisen in Britisch Guiana, iii. p. 740. 
2 MM. Verreaux have received examples from Santa Martha. 
3 See Proc. Zool. Soc. 1857, pp. 211 & 227. 
+ A fourth black Uruditinga from Cuba, allied to U. anthracina, has lately been described by Cabanis under 
the name Hypomorphnus Gundlachii. See Cab. Journ. f. Orn. 1854, Erinnerungs-heft, p. lxxx. 
