157 



Ecgerhinus iincinafus K.vup, Mas. Senck. 1843, 232; in Javd. Coutr. Orn. 1^50, 77. — 

 R. SciiOMB. Reise Gniana, 1848, 736. 



Eostrhamus uncinatjis Strickl. Orn. Syn. i, 1855, 136. 



Leptodon uncinatus Siiarpe, Cat. Ace. C ;M. 1874, 330. 

 Falco ritticandiis Max. Beitr. iii, 1830, 178. 



Cjiinindis vUiicaiidus Pelz. Orn. Bras. 1871, 6, 398. 

 Cymiiidis cucttloides Swains. Class. B. i, 1837, 311; ii,209. 

 ? Cymindis pucheravi Leot. Ois. Triuid. 1866, 40.— Gkay, Hand List, i, 1869, 25.— 



FiNSCH, P. Z. S. 1870, 5.57. 

 ? Cymindis boliviensis BuRM. P. Z. S. 1868, 635 —Gray, Hand List, i, 1869, 28. 



Cymindis (Eegerhinus) boliviensis Gray, Hand List, i, 1869, 28, No. 257. 



Culmen forming a curve of one-fourth to one-third the circumference 

 of a circle; horizoutal diameter of the upper mandible considerably 

 greater through the tomia than nearer the culmen. Wing, 10.70-12.25 ; 

 tail, 8.00-9.00; culmen, 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 ]3lumbeous 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 bauds 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. 1: 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. Auriculars 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 pai'ts barred 

 with dark umber instead of rufous, the bars sometimes almost wholly 

 absent. § (Y.) Youngest?: — Similar to the last, bat 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. Bi'ueath distantly and irregularly barred with fer- 

 ruginous over the whole surface except the throat. 



•Occasionally, as in No. 30541, "North Coast Central America,"' and a Guatemalan 

 skin in Mr. Lawrence's collection, there is another narrower band anterior to this, jast 

 at the end of the upper coverts, or concealed by them. 



tThe tail-pattern of this stage is that seen in occasional individuals in the more uni- 

 formly plumbeous dress, noticed above. 



t Specimens of this plumage retain traces of stage IIL 



VWSome examples of this stage retain traces of .<tage V. 



