iiiKJua UJL' iMUirtJ-Jn ji.ii±J MIDDLE AMERICA 61 



Adult female. — Similar to the male but smaller, with the lower back 

 and rump somewhat less mottled with greenish blue, more sepia; casque 

 shorter (less than 45 mm. long in front). 



Young (juvenal?). — Similar to the adult but with no or very little 

 casque on the crown, the area involved sprinkled with hairlike blackish 

 feathers; the lower back and rump with practically no greenish-blue 

 sheen ; the outer primaries fuscous with very little bluish sheen externally. 



Natal down. — Unknown. 



Adult male. — Wing 394; tail 350; exposed culmen 21; tarsus 83; 

 middle toe without claw 71 mm.®* 



Adult female.— Wing 332-378 (362) ; tail 300-368 (329.1) ; exposed 

 culmen 19-23 (21.1); tarsus 80-92 (85.1); middle toe without claw 

 63-71 (67.5 mm.). 85 



Range. — Resident in the temperate zone forests above 7,500 feet in 

 the high mountains of western Guatemala (above Huehuetenango, Chica- 

 man, Cerro Zunil, Volcan de Fuego, Volcan San Lucas, Volcan de Santa 

 Maria, near Quezaltenango, probably also the Guatemala slope of Tacana, 

 Tajumulco), and adjacent highlands of Chiapas (near Pinabete, and 

 Volcan de Tacana). 



Type locality. — Guatemala. 



Oreophasis derhianus Gray, Gen. Birds, iii, 1844, 485, pi. 121 ; List Birds Brit. Mus., 

 pt. 5, Gallinae, 1867, 14. — Sclater and Salvin, Ibis, 18S9, 224 (Volcan de Fuego, 

 Guatemala; 7,000-11,000 feet; habits, etc.) ; Proc. Zool. Soc. London, 1870, S41, 

 S43 (monogr.). — Sclater, Proc. Zool. Soc. London, 1860, 184 (Volcan de 

 Fuego).— Salvin, Ibis, 1860, 43, 248 (Volcan de Fuego; habits); 1873, 429; 

 1874, 188 (Chicaman, Guatemala). — Ogilvie-Grant, Cat. Birds Brit. Mus., 

 xxii, 1893, 489; Handb. Game Birds, ii, 1897, 218 (Volcan de Fuego) .—Nelson, 

 Auk, XV, 1898, 156 (Volcan de Santa Maria, Guatemala; near Pinabete, Chiapas). 

 — Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1902, 274 (Volcan de 

 Fuego, Chicaman, and Cerro Zunil, Guatemala). — Griscom, Bull. Amer. Mus. 

 Nat. Hist., bciv, 1932, 99 (Volcan San Lucas, Guatemala spec). — Peters, Check- 

 list Birds World, ii, 1934, 24. — Carriker and de Schauensee, Proc. Acad. Nat. 

 Sci. Philadelphia, Ixxxvii, 1935, 413 (Guatemala; Chichoy, 10,000 feet).— 

 Hellmayr and Cono\'er, Cat. Birds Amer., i, No. 1, 1942, 196 (syn. ; distr.). 



0[reophasis] derbianus Reichenow, Die Vogel, i, 1913, 278. 



[Oreophasis] derhianus Gray, Hand-list, ii, 1870, 253, No. 9522. — Sharpe, Hand-list, 

 i, 1899, 15. 



Orephasis derbyanus Reichenbach, Synop. Av., Columb., ii, 1837, pi. 172, fig. 1508. 



0[reophasis] derbyanus Reichenbach, Vol!. Nat. Tauben, 1861, 155, pi. 270. 



[Oreophasis] derbyanus Sclater and Salvin, Norn. Av. Neotr., 1873, 137. 



Penelope fronticornis Van der Hoeven, Handb. Zool., ii, 1852-56, 435 ; Handb. 

 Dierkunde, ii, 1855, 664. 



"■' One specimen, unsexed, but undoubtedly a male. 

 ^ Six specimens from Guatemala. 



