376 



BULLETIlSr 50, UNITED STATES NATIONAL MUSEUM. 



remiges as in adult male; middle rectrices rather dull bronze-green 

 or greenish bronze, usually darker (sometimes blue-blackish) sub- 

 terminall}'; other rectrices with basal half (more or less) dull bronze- 

 green (at least on outer web) , the remaining portion blue-black tipped 

 with brownish gray or grayish brown, this gray tip disappearing 

 toward inner pair; a small ])ale gray or grayish white postocular spot 

 or streak, and beneath this a dusky area extending to beneath eye; 

 under parts dull sooty gray or deej) drab-gray, sometimes slightly 

 paler on chin and upper throat; femoral tufts and tuft on each side 

 of rump white; under tail-coverts paler brownish gray, usually darker 

 mesially, at least toward base; bill as in adult male but usually more 

 extensively dusky, sometimes mostly so; iris and feet as in adult male; 

 length (skins), 78-87 (82); wing, *45-49 (47.2); tail, 25-28 (26.5); 

 middle rectrices, 22-25 (23.2); culmen, 18-19.5 (18.8) .« 



Young male. — -Similar to the adult female but tail as in adult male, 

 except that the lateral as well as the middle rectrices are tipped with 

 gray, and throat (in older specimens) intermixed with metallic green- 

 ish-blue feathers. 



Southwestern Mexico, in States of Guerrero (Dos Arroyos; Aca- 

 pulco; Tecpan; Egido Nuevo; Chinantla; Rincon; Vente de Pele- 

 grino; Rio Papagaio) and Oaxaca (Tehuantepec; Chihuitan; Juchitan; 

 Salina Cruz; Puerto Angel), 



Troch[ilus] doubledayi Bourcier, Proc. Zool. Soc. Lond., 1847, 46 ("Rio Negro;" 

 coll. G. Loddiges);b Rev. Zool., 1847, 259. 



a Ten specimens. 



Besides being smaller than those from localities in the State of Oaxaca (Tehuante- 

 pec, Puerto Angel, and Chihuitan) the adult males from the State of Guerrero (Dos 

 Arroyos, Tecpdn, and Acapulco) have the rump bronze-green, while the former have 

 the rump grayish olive, with little if any metallic gloss; other color-characters, how- 

 ever, vary so much in both series that I am not able to detect other constant differ- 

 ences. The alleged type of Trochilus doubledayi Bourcier, in the collection of the 

 American Mus(Him of Natural History, agrees with the Guerrero series, both in size 

 and coloration; consequently if two forms are to be recognized that from Oaxaca 

 requires a new name, lachc nitida Salvin being unquestionably a synonym of T. 

 doubledayi. 



b See Hartert, Novit. Zool., iv, 1897, 530. A cotype (probably) is in the collection 

 of the American Museum of Natural History, New York City. 



