BIRDS OF NORTH AND MIDDLE AMERICA. 399 
[Eupherusa] poliocerca SctatER and Satvin, Nom. Av. Neotr., 1873, 92.—SHARPE, 
Hand-list, ii, 1900, 116. 
Elupherusa] poliocerca Hartert, Das Tierreich, Troch., 1900, 89 (monogr.). 
[Euphrerusa] poliocerca Mutsant, Ann. Soc. Linn. Lyon, xxii, 1876, 205. 
Genus CALLIPHARUS Elliot. 
Clotho (not of Faujas, 1808, nor Walckenaer, 1809, nor Gray, 1840) Muzsant, Ann. 
Soc. Linn. Lyon, n.s., xxii, 1876, 205 (Cat. Ois.-Mouch., 1875, 9). (Type, 
Eupherusa nigriventris Lawrence.) 
Callipharus Ex1iot, Classif. and Synop. Troch., 1879, 211. (Type, Eupherusa 
nigriventris Lawrence.) 
Small Trochilide (length about 75-78 mm.) related to Eupherusa, 
but tail more strongly rounded; the adult male with head and under 
parts velvety black. 
Bill about as long as head, straight, terete, but rather broad and 
depressed basally; culmen rounded but basally (between nasal 
operculi) contracted into a distinct ridge; terminal portion of max- 
illary tomium minutely serrate; mandible with a distinct lateral median 
groove or sulcus. Nasal operculum very broad and tumid, mostly 
unfeathered, only the upper-posterior portion covered by frontal 
feathering, which, anteriorly, forms a convex line across base of fore- 
head. Tarsus densely clothed with short feathers; middle toe 
apparently very slightly longer than both lateral toes, the hallux 
shorter than the latter. Wing three times as long as culmen, or a 
little more, the outermost primary longest. Tail more than half as 
long as wing, rounded, the rectrices moderately broad, rather soft. 
Coloration.—Hindneck, back, scapulars, wing-coverts, and rump 
metallic bronze-green or greenish bronze; secondaries cinnamon- 
rufous or chestnut, tipped with dusky (as in Hupherusa); lateral rec- 
trices white. Adult male with head and under parts (except under 
tail-coverts) uniform velvety black, the under tail-coverts white; 
adult female with under parts pale gray, the pileum dusky, faintly 
glossed with greenish. 
Range.—Costa Rica and western Panamé. (Monotypic.) 
_ Although referred to Elvira by Dr. Hartert, the single species 
constituting the genus Callipharus differs in the presence of minute 
serrations to the terminal portion of the maxillary tomium, rufous 
secondaries, and rounded tail, in all of which characters it agrees 
with EHupherusa and not with Elvira. Were it not for the strikingly 
different and quite unique coloration of the adult male, involving 
structural differences in the feathers of the pileum and under parts 
(which are beautifully blended and velvety instead of harsh and con- 
spicuously imbricated and squamate), and the decidedly more rounded 
tail, it might well be merged with Hupherusa. Considering all its pe- 
culiarities, I feel sure that Callipharus should stand alone in any 
arrangement of the family which does not involve a very great 
reduction in the number of genera. 
