88 FALCONIDE. 
Saturate schistaceus unicolor, criste plumis ad basin albis, tectricibus supracaudalibus stricte albo terminatis, 
remigibus subtus ad basin griseo variegatis ; cauda nigra albo terminata, fascia mediana et altera subtus ad 
basin albis; rostro corneo, cera, mandibule basi et pedibus flavis. Long. tota circa 23:0, alee 20-0, 
caudz 10-5, tarsi 4°3. (Descr. exempl. ex Chiguinda, Ecuador. Mus. nostr.) 
Juv. Supra nigricanti-brunneus, cervicis plumis late cervino marginatis, superciliis cervinis: subtus brunneus, 
pectore et tibiis fere unicoloribus, gutture cervino-brunneo striato, abdomine quoque cervino, plumis 
omnibus medialiter brunneis ; tectricibus subcaudalibus cervinis brunneo transfasciatis, remigibus nigri- 
cantibus ad basin cervino-albidis nigricante punctatis. (Descr. juv. ex Tehuantepec, Mexico. Mus. 
nostr.) 
Hab. Mexico (Mus. Norv.5), Tehuantepec (Swmichrast); Guatemata, San Geronimo 
(fide Gurney ®); Panama, Calobre (Arcé +).—Soutn America, Colombia °, Venezuela, 
Ecuador, Peru ! 5, Chile ©. 
This species is evidently rare in all parts of its range, and we have but few examples. 
Gurney records one in the Norwich Museum said to have come from South Mexico, 
and we possess an immature bird procured in Tehuantepec by Sumichrast. The former 
also mentions a specimen from San Gerdnimo®, though we never met with it in 
Guatemala. Arcé forwarded an immature example from Calobre in Veraguas*, and 
its range extends from Colombia and Venezuela to Ecuador and apparently even to 
Chile. Its ally, H. coronatus, is said by d’Orbigny to frequent the banks of rivers and 
to resemble in habits the species of Urubitinga. In Patagonia it is stated that it eats 
skunks, a food which few animals will touch, and also armadillos, taking both into the 
air and letting them fall to the ground in order to kill them. 
MORPHNUS. 
Morphnus, Cuvier, Régne Anim. i. p. 318 (1817) ; Sharpe, Cat. Birds Brit. Mus. i. p. 222; Ridgw. 
Bull. U.S. Geol. Surv. i. p. 146. 
Compared with both Harpyhaliaetus and Thrasaetus, the members of the genus 
Morphnus are slender and graceful in form, having a very long tail, nearly equalling 
the wing. ‘The crest is long and pendent, composed of narrow feathers fully four 
inches in length. Mr. Ridgway points out that the tarsus is more than twice the 
length of the middle toe, while the nostril is of peculiar shape, “ broadly oval, obliquely 
vertical, with the anterior side gradually bevelled off to the edge of the cere.” The 
wing is rounded, and the primaries scarcely exceed the secondaries in length. 
Two species are known—WV. guianensis inhabiting Amazonia, Guiana, and Colombia, 
just occurring within our limits, while MM. ¢eniatus is known only from Ecuador. 
1. Morphnus guianensis. (Tab. LXIII.) 
Falco guianensis, Daud. Traité, ii. p. 78°. 
Morphnus guianensis, Cassin, Pr. Ac. Phil. 1860, p. 182°; v. Pelz. Orn. Bras. p. 4°; Scl. & Salv. 
P. Z. S. 1878, p. 802*: Sharpe, Cat. Birds Brit. Mus. i. p. 222°; Ridgw. Bull. U. 8. Geol. 
Surv. ii. p. 149 ; Sharpe, Hand-l. Birds, 1. p. 259". 
Ad. Supra nigricans, capite summo griseo ; criste plumis elongatis nigro terminatis, alis extus griseo variegatis : 
