BIRDS OF NORTH AND MIDDLE AMERICA. 657 
inner toe about as long as middle toe, the outer slightly shorter. 
Wing more than four to more than five times as long as exposed 
culmen, the outermost primary longest, strongly incurved and broadly 
rounded terminally. Tail three-fifths to nearly two-thirds as long 
as wing, slightly rounded in adult males, more strongly rounded, 
with middle rectrices usually shorter than second pair, in adult 
females, the rectrices rather broad, rounded terminally. 
Coloration.—Adult males with pileum, including occipital crest, 
brilliant metallic green (the crest more bluish terminally) or the crest 
metallic blue or violet (at least in part); rest of upper parts rather 
dark metallic green, the tail purplish black; under parts sooty black- 
ish, passing into sooty gray on chin and throat. Adult females and 
young bronze-green above, including middle rectrices, gray beneath; 
lateral rectrices purplish black, more or less bronzy or greenish basally, 
tipped with gray. 
Range.—Lesser Antilles; island of Tobago. (Three species, or 
subspecies.) 
This genus is so evidently closely related to Chrysolampis that it 
is difficult to understand why they should be so widely separated in 
most classifications of the group. 
KEY TO THE SPECIES AND SUBSPECIES OF ORTHORHYNCUS. 
a. Pileum and pointed occipital crest brilliantly metallic. (Adult males.) 
b. Occipital crest green or mostly green, like crown and forehead. (Orthorhyncus 
exilts.) 
c. Occipital crest very faintly, if at all, tinged with blue at tip. (Porto Rico, 
St. Thomas, etc., of Greater Antilles, and Lesser Antilles except St. Vincent, 
Barbados, Grenada, and Grenadines.) 
Orthorhyncus exilis exilis, adult male (p. 658). 
cc. Occipital crest distinctly blue terminally. (St. Vincent.) 
Orthorhyncus exilis ornatus, adult male (p. 661). 
bb. Occipital crest (abruptly) violet or violet-blue. (Orthorhyncus cristatus.) 
c. Crest more decidedly violet; throat darker gray. (Barbados.) 
Orthorhyncus cristatus cristatus, adult male (p. 662). 
ce. Crest more bluish violet to violet-blue; throat paler gray. (Grenada and 
Grenadines)....... Orthorhyncus cristatus emigrans, adult female (p. 664). 
aa. Pileum metallic green (not brilliant); no crest. 
b. Under parts of body dark sooty; lateral rectrices without distinct gray tip. 
(Immature males.) & 
bb. Under parts of body gray. (Adult females.) 
@J am unable to give characters for certain identification of immature males and 
adult females. 
81255°—Bull. 50—11——42 
