BIRDS OF NORTH AND MIDDLE AMERICA. 455 
decidedly longer than head, stout, more or less decurved, terminal 
portion of maxillary tomium minutely serrate, and color of tail 
mainly either chestnut glossed with purple, or else Gin A. viridis) 
bright bluish green or steel blue. 
Bill decidedly longer than head, stout, rather broad and depressed 
basally, faintly to decidedly decurved; culmen rounded but at base 
contracted into a distinct narrow ridge; terminal portion of maxillary 
tomium minutely serrate; mandible with a broad lateral median 
sulcus or groove, which basally involves the greater part of upper 
half of the ramus. Nasal operculum very narrow anteriorly, nude 
for anterior and exterior portion, the frontal feathermg extending 
anteriorly much beyond middle of nasal operculum, forming a more 
or less distinct but sometimes very short and obtuse point or antia 
on each side of the mesorhinium. Tarsus naked, rather stout; lateral 
toes nearly equal in length (or the outer one slightly longer), both 
slightly shorter than middle toe, the hallux shorter than lateral toes; 
claws relatively small. Wing less than three times as long as exposed 
culmen, the outermost primary longest. Tail more than half as long 
as wing, slightly rounded or emarginate, the rectrices broad, firm, 
rounded, or broadly subangular terminally. 
Coloration—Above metallic green, bronze-green, bronze or olive 
glossed with coppery bronze; tail (except middle rectrices) chestnut 
glossed with metallic violet or purple and margined with blackish, or 
else dark steel blue, greenish blue, or bluish green; adult males with 
under parts metallic green (with or without black on throat or chest), 
black medially bordered laterally with greenish blue or (on neck) 
with metallic violet-red, or else chin and throat greenish golden 
bronze, breast black; adult females (except of A. mango and A. viridis, 
in which sexes are alike in color), wholly dull whitish beneath (A. 
dominicus and A. aurulentus), or with a black, green, or bluish median 
stripe bordered laterally with a whitish one. 
Range.—Southern Mexico to Cayenne, eastern Brazil, Bolivia, and 
Peru; Greater Antilles Jamaica, Haiti, Porto Rico, and St. Thomas). 
(Nine species.) 
KEY TO THE SPECIES AND SUBSPECIES OF ANTHRACOTHORAX, 
a. Tail not steel blue; under parts not uniform green (if green the chest more bluish, 
in contrast with emerald green of throat and bronze-green of sides). 
b. Sides of neck metallic reddish purple or purplish red; under parts wholly black, 
or else chin and throat (only) dark metallic greenish or bluish. (Jamaica.) 
Anthracothorax mango, both sexes (p. 457). 
bb. Sides of neck not metallic purple or reddish; under parts not wholly black, 
nor with chin and throat dark metallic greenish or bluish. 
c. Under parts without white (except femoral tufts). (Adult males.) 
d. Throat black, at least medially. 
e. Throat and under parts of body broadly (mostly) black. (Anthracothorax 
nigricollis.) 
