496 | BULLETIN 50, UNITED STATES NATIONAL MUSEUM, 
aa. Throat brownish gray, more or less strongly suffused with buffy or cinnamon. 
(Adult females.c) 
b. Green of upper parts less bronzy; throat less strongly cinnamomeous. 
Lampornis margarite, adult female (p. 499). 
bb. Green of upper parts more bronzy; throat more strongly cinnamomeous. 
Lampornis pringlei, adult female (p. 500). 
LAMPORNIS AMETHYSTINUS AMETHYSTINUS Swainson. 
CAZIQUE HUMMING BIRD. 
Adult male—Above metallic bronze-green, greenish bronze, or 
bronze, usually duller (sometimes faintly metallic olive) on rump, 
‘the feathers of pileum usually darker centrally; upper tail-coverts 
dull black, usually faintly glossed with bluish; tail black, very faintly 
glossed with bluish, the lateral rectrices tipped with brownish gray; 
remiges dusky, faintly glossed with violaceous; loral, suborbital, and 
auricular regions brownish black or dusky, the last margined above 
by a postocular (supra-auricular) line of white or grayish white, the 
first and second margined beneath by a rictal streak (more or less 
distinct) of cinnamon or cinnamon-buff; chin grayish, usually more 
or less suffused with cinnamon or buffy, the feathers slightly darker 
centrally; throat bright metallic reddish purple (solferino to wine 
purple), the feathers conspicuously margined with pale buffy gray or 
grayish white, producing a distinctly squamate effect; rest of under 
parts brownish gray, the sides and flanks overlaid by metallic bronze- 
green, greenish bronze, or bronze; under tail-coverts deeper brownish 
gray centrally, broadly margined with dull white or grayish white; 
femoral and lumbar tufts white; bill dull black, the mandible some- 
times brownish; iris dark brown; feet pale brownish (in dried skins), 
the claws and end of toes darker; length (skins), 109-121 (114); wing, 
65-71 (67.6); tail, 39-45 (42.3); culmen, 20-23 (21.5).® 
Adult female.—Similar to the adult male, but pileum darker and 
duller (sometimes dusky, faintly glossed with bronze-green or bronzy) ; 
chin and throat dull cinnamon (the feathers abruptly dusky grayish 
basally), and sides and flanks very faintly, if at all, glossed with 
metallic green or bronze; tips of lateral rectrices paler gray and more 
sharply defined. 
Southeastern Mexico, in States of Mexico (Temascaltepec; Valley 
of Mexico; Hacienda Eslava), Hidalgo (Rel del Monte), Vera Cruz 
(Jalapa; Cérdova; Codtepec; Montafias de Orizaba; Playa Vicente), 
and Oaxaca (Oaxaca; Mount Zempodltepec; Toténtepec). 
@ No adult female of L. amethystinus, in any of its forms, is available at the time 
of preparing this ‘‘Key;” and since the differences between the females of L. mar- 
garite and L. pringlei, as given above, are based on a single specimen of each they 
may not hold good. 
b Nine specimens. 
