754 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
adult male; length (skins), 258-304 (286); wing, 143-153.5 (146); 
tail, 148-170 (157.8); culmen, 21-23 (22); tarsus, 13.5-15.5 (14.2); 
inner anterior toe, 13.5-15 (14.2).¢ 
Young male (nestling).—Similar to the adult female, but abdomen, 
sides, and flanks grayish sooty passing into pale fulvous or buffy on 
anal region, the under tail-coverts dull white and pale buffy with 
basal portion dark sooty. 
Southwestern Costa Rica (San Mateo; Las Trojas; Pigres; Pozo 
Azdl de Pirris; Pozo del Rio Grande; El Pozo de Térraba; Boruca; 
El General; Palmar) and western Panama (Divala; Bugaba; Bibalaz; 
Veragua; Chiriquf). 
Trogon bairditi Lawrence, Ann. Lyc. Nat. Hist. N. Y., ix, 1870 (extras issued 
April, 1868), 119, 120 (San Mateo, w. Costa Rica; coll. U. 8. Nat. Mus.).— 
Franrzius, Journ. fiir Orn., 1869, 313 (Costa Rica).—ZELEDON, Proc. U. 8. 
Nat. Mus., viii, 1885, 109 (Costa Rica); Anal. Mus. Nac. Costa Rica, i, 1887, 
120 (Pozo Aziil de Pirrfs and Las Trojas, s. w. Costa Rica).—CHERRig, Expl. 
Zool. Merid. C. R., 1893, 47 (Palm4r and Boruca, s. w. Costa Rica).—Rine- 
way, Condor, vii, 1905, 155, in text (near Pigres, w. Costa Rica). 
Trogon bairdi Savin, Ibis, 1869, 316; Proc. Zool. Soc. Lond., 1870, 202 (Bugaba, 
Panam4; descr. adult female).—Govutp, Mon. Trog., ed. 2, 1875, pl. 23 and 
text.—Grant, Cat. Birds Brit. Mus., xvii, 1892, 461 (Bugaba and Bibal4z, 
Panam4).—Satvin and Gopman, Biol. Centr.-Am., Aves, ii, 1896, 496.— 
Banes, Auk, xxiv, 1907, 294 (Boruca and Pozo del Rio Grande, s. w. Costa 
Rica).—Carriker, Ann. Carnegie Mus., vi, 1910, 560 (s. w. Costa Rica; 
habits). 
[Trogon] bairdi SctaTeR and Satvin, Nom. Av. Neotr., 1873, 104.—SHarps, 
Hand-list, ii, 1900, 148. 
Trogon clathratus (not of Salvin) Lawrence, Ann. Lyc. N. Y., ix, 1868, 119 (San 
Mateo, Costa Rica; descr. supposed female).—(?) Franrzivs, Journ. fiir Orn., 
1869, 313 (Costa Rica). 
TROGON STRIGILATUS CHIONURUS (Sclater and Salvin). 
WHITE-TAILED TROGON. 
Adult male.—Head, neck, and upper chest black glossed with violet, 
the lower chest and sides of breast dark metallic bluish violet or violet- 
blue; back, scapulars, and upper rump brilliant metallic green, passing 
into violet-blue on upper margin of back, lower rump, and upper tail- 
a Thirteen specimens. 
. : Cul- Inner 
Locality. Wing. | Tail. Ten: Tarsus.| ante- 
J rior toe. 
, MALES. 
Ten adult males from Costa Rica........-.-...-2---2222-0e2ee: 147.1 | 157.6 23.5 14.3 14.4 
Eight adult males from western Panama (Chiriquf)........... 145.7 | 153.8 23.2 14.1 14.5 
FEMALES. 
Nine adult females from Costa Rica.............--.222--+-5-5+ 145.7 | 155.5 22.1 14.2 14.2 
Four adult females from western Panamé..........-... sities 146.6 | 163.1 21.9 14.4 14.1 
