Jan. 3°] 
1902 BANGS — CHIRIQUI BIRDS 27 
Color. — Adult male: forehead dusky green, with little lustre; hind neck 
and back shining, dark, metallic green blue; upper tail coverts dark blue, 
with dark subapical band and slight buffy tips; basal portion of rectrices 
blue, rest black, with grayish white tips to two central feathers ; sides like 
back, but not so brilliant; centre of belly dark gray; under tail coverts dark 
gray fringed with whitish; a well-defined chestnut gular stripe; auriculars 
blackish. 
Adult female similar to the male above; below, dark gray, with only slight 
metallic green blue on sides; gular stripe more extended and paler in color; 
also slight superciliary and malar stripes, of pale chestnut, enclosing the black 
auriculars ; all the rectrices tipped with grayish white, the light tips of the two 
central feathers much longer than in the male. 
Young male, similar to female, but the light tips of central rectrices shorter 
(as in the adult male). 
MEASUREMENTS (in millimeters). 
No. Sex and age Wing Tail Culmen! 
8414 & ad. 62.0 57-0 42.5 
8415 ad. 62.0 56.0 = 
8416 d ad. 61.0 52.0 42.5 
8417 6 ad. 62.5 58.0 41.5 
8415 A ads 62.0 54-0 41.0 
8422 Q ad. 61.0 68.5 40.5 
8423 @ ad. 60.5 70.0 41.5 
8424 @ ad. 60.0 69.0 40.0 
Remarks. — Costa Rica and Chiriqui specimens of this wide- 
ranging Phaéthornis have always been referred to Bourcier and 
Mulsant’s subspecies emz/zez, described from Bogota. On carefully 
comparing a large number of skins I find that the northern 
examples constitute a race more different from either true P. guy 
of Trinidad and Venezuela or P. guy emilie of Bogata than are 
these two from each other. 7. guy coruscus differs from the 
southern races in its much more glittering back and sides and in 
the more bluish color of these parts, besides having a shorter bill. 
1 Jn Columbian examples of P. gzy emzzlie the wing averages about the same as in the present 
series ; the culmen is, however, longer, measuring about 44 mm. in the male and 43 in the female. 
