550 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CHLOROSTILBON MAUG^I (Audebert and Vieillot). 



PORTO RICAN EMERALD. 



Adult male. — Above rather dark metallic green or bronze-green; 

 tail uniform glossy blue-black, or black glossed with steel blue; 

 reniiges very dark brownish slate or dusky, faintly glossed with 

 violaceous; under parts wholly brilliant metallic golden green, the 

 chest sHghtly purer green (less golden) ; femoral and lumbar tufts 

 white; maxilla dull black; mandible pale brownish (pink or reddish 

 in life?), with blacldsh tip; iris dark brown; feet dusky; length 

 (skins), 84-95 (87); wing, 45-50 (48.6); tail, 32.5-38.5 (35.8), middle 

 rectrices, 20-23 (21.5); culmen, 13-14 (13.6).« 



Adult female. — Above metallic green or bronze-green, including 

 middle pair of rectrices, these sometimes more bronzy; second pair 

 of rectrices bronze-green with terminal portion black, the third pair 

 similar, but the black more extensive and a small pale gray spot at 

 apex of inner web; fourth pair with more than basal half bronze- 

 green (duller than on middle pair), crossed by a broad subterminal 

 area of blue-black and with a large terminal spot of pale gray; fifth 

 (outermost) pair similar, but with terminal gray spot still larger and 

 the basal area gray faintly glossed with bronze-green; remiges very 

 dark brownish slate or dusky, faintly glossed with violaceous; loral 

 and suborbital regions dusky; malar region and under parts very 

 pale gray or grayish white, the sides and flanks mostly metallic 

 green, with feathers deep brownish gray beneath surface; femoarl 

 and lumbar tufts white; bill dull black, the base of mandible usually 

 sHghtly more brownish; iris and feet as in adult male; length (skins), 

 77-88 (83) ; wing, 44.5-48 (45.7) ; tail, 26-32.5 (28.9), middle rectrices, 

 22-25 (23.6); culmen, 14-16 (14.8).^ 



Immature male. — Similar to the adult male, but green of under 

 parts darker and much duller, with brilliant green feathers, indicat- 

 ing the adult plumage, lirst appearing on lower throat; mandible 

 mostly dusky. 



Porto Rico, Greater Antilles (Adjuntas; Mayaguez; Lares; Ponce; 

 El Yunque; Utuado). 



Trochilus maugaeus Audebert and Vieillot, Ois. Dores, i, 1801, 71-79, 80, 93, 

 pis. 37, 38 (Porto Rico; coll. Paris Mus.). — Temminck, Cat. Syst. du Cab. 

 d'Orn., 1807, 84.— Vieillot, Nouv. Diet. d'Hist. Nat., vii, 1817, 368. 



T[rochilus\ maugseus Vieillot, Tabl. Enc. Meth., ii, 1822, 567. 



Ornismya maugaei Lesson, Hist. Nat. Ois.-Mouch., 1829, pp. xiv, 194, pis. 68, 69; 

 Index Gen. and Synop. Troch., 1832, p. xxii. 



Trochilus maugei Sundevall, (Efv. k. Vet.-Ak. Forh., 1869, 600. 



Sporadinus maugei Gundlach, Joum. fur Om., 1874, 312. 



[Sjporadinus] maugeus Bonaparte, Rev. et Mag. de Zool., 1854, 255. 



Sporadinus maugaeus Gundlach, Joum. fiir Om., 1878, 160, 182 (crit.). 



« Six specimens. & Ten specimens. 



