157 
Regerhinus uncinatus Kaup, Mas. Senck. 1845, 262; in Jard. Contr. Orn. 185C, 77.— 
R. Schomb. Reise Guiana, 1848, 736. 
Rostrhamus uncinatus Strickl. Orn. Syn. i, 1855, 136. 
Leptodon uncinatus Sharpe, Cat. Acc. B. M. 1874, 330. 
Faico vitticaudus Max. Beitr. iii, 1830, 178. 
Cymindis vitticaudus Pelz. Orn. Bras. 1871, 6, 398. 
Cymindis cuculoides Swains. Class. B. i, 1837, 311; ii, 209. 
f Cymindis pucherani Lfioi\ Ois. Triuid. 1866, 40.— Gray, Hand List, i, 1869, 25.— 
FiNSCH, P. Z. S. 1870, 557. 
? Cymindis boliviensis Burm. P. Z. S. 1863, 635 —Gray, Hand List, i, 1869, 28. 
Cymindis ( Regerhinus ) boliviensis Gray, Hand List, i, 1869, 28, No. 257. 
Culrnen forming a curve of one-fourtli to one-third the circumference 
of a circle; horizontal diameter of the upper mandible considerably 
greater through the tomia than nearer the culrnen. Wing, 10.70-12.25; 
tail, 8.00-9.00; culrnen, 1.00-1.45 ; tarsus, 1.40-1.50; middle toe, 1.15-1.25. 
Fourth to fifth quills longest; first .shortest. 
a. Light phase. 
Adult: —(I.) Uniform dark plumbeous or plumbeous-black, the occiput 
with much basal white; tail deeper black, narrowly tipped with white 
or ash, and crossed about the middle by a broad zone of white, this 
sometimes tinged with ash.* (II.) Similar, but paler plumbeous beneath, 
the crissum pale ochraceous or ochraceous-white (sometimes with dis¬ 
tant bars), and the entire lower surface barred narrowly with white 
Primaries with distant indistinct bands of black, especially on inner webs. 
Upper tail-coverts tipped and barred with pale ash or white. Tail with 
an additional narrower band at the end of the upper coverts,t the 
light bars (which are more or less tinged with ash) passing into pale 
cream-color or white on the webs. Inner webs of the primaries some¬ 
times banded (about equally) with white and plumbeous.f Young: —(III.) 
Above blackish-brown or brownish-plumbeous, approaching black ante¬ 
riorly, and interrupted by a broad and continuous nuchal collar of deep 
ochraceous or bright rufous. Tail with three about equal zones of 
black and grayish, and narrowly tipped with the latter. A«uriculars and 
forehead bluish-ashy; pileum like the back. Beneath white or ochra- 
ceous-white (more ochraceous on the crissum), with broad nearly equal 
transverse bars of ferruginous over the whole surface, except sometimes 
on the crissum. Inner webs of primaries white, distantly banded with 
black. Inner primaries tinged with rufous. (IV.) Younger f :—Generally 
similar, but feathers of upper parts more or less bordered with rufous; 
secondaries, tertails, and primaries narrowly tipped with white or ochra¬ 
ceous, and very obscurely banded with darker. Nuchal collar white and 
sometimes badly defined. Tail crossed with four nearly equal bands of 
black and grayish, and narrowly tipped with white. Auriculars and 
forehead blackish-brown, like the back and pileum. Lower parts barred 
with dark umber instead of rufous, (be bars sometimes almost wholly 
absent.§ (V.) Youngest ?: —Similar to the last, but the rufous borders 
to the feathers of the upper parts broader, very conspicuous on the ter- 
tials, secondaries, and primaries. Auriculars and broad nuchal collar 
pale ochraceous. Beneath distantly and irregularly barred with fer¬ 
ruginous over the whole surface except the throat. 
* Occasionally, as in No. 30541, “North Coast Central America, - ’ ancl a Guatemalan 
skin in Mr. Lawrence’s collection, there is another narrower band anterior to tins, just 
at the end of the upper coverts, or concealed by them. 
tTke tail-pattern of this stage is that seen in occasional individuals in the more uni¬ 
formly plumbeous dress, noticed above. 
^Specimens of this plumage retain traces of stage III. 
Some examples of this stage retain traces of stage V. 
