BIRDS OF NORTH AND MIDDLE AMERICA. 457 



ff. Under parts of body with black confined to chest and upper breast; 

 upper parts more bronzy; smaller (wing averaging 62.5, tail 36.7, 

 culmen 22.9). (Island of Porto Rico, St. Thomas, St. Johns, and 



Anegada.) Anthracothorax aurulentus, adult male (p. 470). 



cc. Under parts partly white. 

 d. Under parts with a median stripe of black, black and bluish green, or bluish 

 green, bordered laterally (on each side) by a stripe of white. 

 e. Median stripe wholly black. 

 /. Smaller (wing averaging 65.2, tail 35.2, culmen 24.1). 



Anthracothorax nigricollis nigricollis, female and young (pp. 459, 

 460). 

 ff. Larger (wing averaging 09.5, tail 37, culmen 27.2). 



Anthracothorax nigricollis iridescens, female and young (extralimital). 

 ee. Median stripe only partly black or without black. 

 /. Median stripe black on throat, bluish green on chest and breast. 

 g. Bill longer (culmen 25-31, averaging 28.1). 



Anthracothorax prevostiiprevostii, femaleand young(pp. 463, 464). 

 gg. Bill shorter (culmen 22-28, averaging much less than 28). 

 h. Culmen 22.5-28, averaging 25.4. 



Antracothorax prevostii gracilirostris, female and young (p. 465). 

 hh. (?ulmen 22-23.5, averaging 22.7. 



Anthracothorax prevostii hendersoni, female and young (p. 466). 

 ff. Median stripe green on throat, black on chest, breast, and abdomen. 



Anthracothorax gramineus, female and young (extralimital). 

 ee. Median stripe wholly bluish green. 



Anthracothorax veraguensis, female and young (p. 467). 

 dd. Under parts pale grayish without any black or greenish median stripe. 

 e. Larger (wing averaging 65.3, tail 37.5, culmen 25.6); lateral rectricea 

 extensively chestnut basally; lateral under parts conspicuously spotted 

 with metallic green; green of upper parts less bronzy. 



Anthracothorax dominicus, female and young (pp. 468, 469). 

 ee. Smaller (wing averaging 58.1, tail 32.7, culmen 23.6); lateral rectricea 

 with little if any chestnut; lateral under parts with little if any metallic 

 green spotting; green of upper parts more bronzy. 



Anthracothorax aurulentus, female and young (jjp. 470, 471). 

 aa. Tail steel blue; under parts uniform green. (Island of Porto Rico.) 



Anthracothorax viridis, both sexes (p. 472). 



ANTHRACOTHORAX MANGO (Lmnaeus). 



MANGO HUMMING BIRD. 



Adult male. — Pileiim dull dusky bronze, the feathers narrowly and 

 mdistinctly margined with darker; occiput, hindneck, upper back, 

 anterior scapulars, and lesser wing-coverts metallic coppery purple, 

 the feathers grayish duslvy at base and with a concealed subterminal 

 band of greenish bronze; lower back, posterior scapulars, rump, and 

 upper tail-coverts dull duslr^ greenish bronze, more or less tinged 

 with coppery bronze or purplish, the lower back sometimes strongly 

 so; middle pair of rectrices varying from dusky greenish bronze to 

 dull black; remaining rectrices deep chestnut, margined terminally 

 with dark bluish green, dusky bronze-green, or blackish (the outer- 

 most rectrix also edged along outer web with the same), the chestnut 

 portion of rectrices glossed with metallic purple, violet, or bluish; 



