BIRDS OF NORTH AND MIDDLE AMERICA, 743 
Bill very large and strong, as deep as broad at base, the culmen 
strongly arched, not distinctly if at all ridged; gonys shorter than 
mandibular rami, strongly ascending terminally; interramal space 
as broad, distally, as long, broadly rounded anteriorly; tomia dis- 
tinctly serrate for anterior half, the notches and tooth-like points 
deeper on mandible than on maxilla, the tip of the mandible form- 
ing a distinct ascending point. Nostril rounded, nonoperculate, 
concealed by an antrorse tuft of bristly plumes. Feathers of chin 
and malar apex bristly, antrorse, the former strongly recurved. 
Feathering of head normal; seventh, eighth, or seventh and sixth 
primaries longest, the tenth (outermost) less than half as long as the 
longest; tail slightly shorter to decidedly longer than wing, gradu- 
ated for one-fourth its length or slightly more, the lateral rectrices 
not truncate at tip nor distinctly if at all tapering terminally, the 
terminal outline of inner web strongly oblique, the middle rectrices 
subtruncate. Tarsus decidedly shorter than longest toe, naked for 
more than lower half; toes very strong, the two anterior ones united 
for more than half their length. 
Coloration.—Adult males with head, neck, chest, and upper parts 
metallic bronze-green to bluish green (sometimes blue on rump, 
upper tail-coverts and middle rectrices), the wing-coverts and sec- 
ondaries finely vermiculated with black and grayish white, the 
three outermost rectrices (on each side) plain blackish or slaty (in one 
species) with narrow white bars; under parts, posterior to chest, 
bright red; adult females with upper parts slate-color, the anterior 
under parts slate-gray. Young very different from adults (con- 
spicuously spotted). 
Range.—Southern Mexico to Amazon Valley. (Four species.) 
KEY TO THE SPECIES AND SUBSPECIES OF CURUCUJUS. 
a. Upper parts (except wings) and chest metallic green (sometimes bluish on rump 
and upper tail-coverts); maxilla yellow or orange. (Adult males.) 
b. Lateral rectrices uniform blackish slate (the outer web minutely freckled with 
pale grayish basally). 
c. No white on upper breast. (Southeastern Mexico to eastern Panamé.) 
Curucujus massena, adult male (p. 744). 
cc. A white band across upper breast (next to green of chest). (Curucujus 
melanurus.) 
d. Smaller (wing 147-165, averaging 155.3; tail 143-175, averaging 160.1). 
(Colombia to western Ecuadér, Amazon Valley, and Cayenne.) 
Curucujus melanurus melanurus, adult male (extralimital).¢ 
@ Trogon melanurus Swainson, Anim. in Menag., pt. iii, Jan. 1, 1838, 329 (Demerara, 
Brit. Guiana); Gould, Mon. Trog., ed. 1, 1838, text to pl. 18; ed. 2, 1875, pl. 29 and 
text; Grant, Cat. Birds Brit. Mus., xvii, 1892, 472.—[Curucujus] melanurus Bona- 
parte, Consp. Voluc. Zygod., 1854, 14.—T{[roctes] melanurus Cabanis and Heine, 
Mus. Hein., iv, 1863, 201.—Trogon nigricaudata Gould, Mon. Trog., ed. 1, pl. 18.— 
T[roctes] mesurus Cabanis and Heine, Mus. Hein., iv, Feb., 1863, 202 (Babahoyo, 
w. Ecuadér; coll. Heine Mus.). 
