876 ° BULLETIN 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- 
terminally; 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 pale gray or grayish white postocular spot 
or streak, and beneath this a dusky area extending to beneath eye; 
under parts dull sooty gray or deep 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; Tecpin; Egido Nuevo; Chinantla; Rincén; 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);® Rev. Zool., 1847, 259. 
a Ten specimens. 
Eex- 
Locality. Wing. | Tail. | posed 
culmen. 
MALES, 
Six adult males from Oaxaca...... 222. .2 ce eee eee e eee e econ cen eeescnccneee 48.5 31.9 18.7 
Five adult males from Guerrero........-.-.--22--2-0- 202 e eee ee eee eee eens 47.1 29.2 17 
FEMALES, 
One adult female from Oaxaca..........-.. Sos ieehadanaedeauseedam en etaceceusn 47.5 26 19.5 
Nine adult females from Guerrero............-.00- 200 c cece eee eee eee ee eee eee 47.2 26.5 18.8 
Besides being smaller than those from localities in the State of Oaxaca (Tehuante- 
pec, Puerto Angel, and Chihuitén) the adult males from the State of Guerrero (Dos 
Arroyos, Tecp4n, 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 Museum 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, Jache nitida Salvin being unquestionably a synonym of T. 
doubledayt. 
b See Hartert, Novit. Zool., iv, 1897, 5380. A cotype (probably) is in the collection 
of the American Museum of Natural History, New York City. 
