496 BULLETIN 50;, UNITED STATES NATIONAL MUSEUM. 



aa. Throat brownish gray, more or less strongly suffused with buffy or cinnamon. 

 (Adult females. o) 

 b. Green of upper parts less bronzy; throat less strongly cinnamomeous. 



Lampornis margaritje, adult female (p. 499). 

 bb. Green of upper parts more bronzy; (hroat 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 wliite, the 

 first and second margined beneath by a rictal streak (more or less 

 distinct) of cinnamon or cinnamon-buff; cliin grayish, usually more 

 or less suffused with cinnamon or buft'y, 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 metalhc 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 (m dried skhis), 

 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 (Real del Monte), Vera Cruz 

 (Jalapa; Cordova; Coatepec; Montaiias de Orizaba; Play a Vicente), 

 and Oaxaca (Oaxaca; Mount Zempoal tepee; Toton tepee). 



o 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- 

 garitx and L. pringlei, as given above, are based on a single specimen of each they 

 may not hold good. 



b Nine specimens. 



