542 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Genus RICCORDIA Reichenbach. 
[Chlorestes.] 0. Riccordia Ruicuensacn, Aufz. der Colib., March?, 1854, 8. (Type, 
Riccordia ramondii Reichenbach= Trochilus ricordit Gervais.) 
Ricordia (emendation) Stmon, Cat. Troch., 1897, 18. 
Sporadinus BoNaPaRTE, Rev. et Mag. de Zool., vi, May, 1854, 255. (Type, as 
fixed by Gray, 1855, Trochilus ricordii Gervais.) 
Sporadicus (emendation, on grounds of purism) CaBanis and Here, Mus. Hein., 
iii, March, 1860, 25. 
Small Trochilide (length about 95-105 mm.) resembling the longer 
tailed species of Chlorostilbon, but with lateral rectrices relatively 
much wider. 
Bill about as long as head, straight, slightly depressed; culmen 
broadly rounded, but basally contracted into a more or less distinct 
narrow ridge; tomia smooth; mandible with a distinct median lateral 
groove, the maxilla with a faint indication of a similar one. Nasal 
operculum broad and convex posteriorly, feathered on upper posterior 
portion, the frontal feathering forming two obtuse antiz which extend 
about as far as middle of nasal operculum. Tarsus clothed with short 
feathers; lateral toes about equal, slightly shorter than middle toe, 
the hallux shorter than lateral toes. Wing more than three times as 
long as exposed culmen (slightly less in females), the outer primary 
longest. Tail nearly as long as wing in adult males, about three- 
fourths as long in females, deeply forked, the lateral rectrices broad, 
all rounded at tip. 
Coloration.—Above metallic green or bronze-green; adult males 
with under parts bright metallic green (one species with a velvety 
black jugular spot), the tail black with middle rectrices more or less 
bronzy; adult females with under parts brownish gray, the tail much 
as in adult males. 
Range.—Bahama Islands, Cuba, and Haiti. (Two species.) 
This genus is very close to Chlorostilbon, and differs mainly, if not 
solely, in the relatively broader lateral rectrices, the form of the tail 
being very similar to that of some species of Thalurania. As stated 
under Chlorostilbon, it has been found necessary to transfer from this 
genus to the latter 2. maugexi, of Porto Rico, in order that it may be 
possible to characterize the two groups. 
KEY TO THE SPECIES AND SUBSPECIES OF RICCORDIA. 
u. Under parts mostly metallic green. (Adult males.) 
6. No black on under parts. (Riccordia ricordit.) 
ce. Tail averaging longer and relatively more deeply forked (average length 43.9, 
average depth of fork 23.2); rectrices less distinctly bronzy. (Cuba, includ- 
ing Isle of Pines.)........-. Riccordia ricordii ricordii, adult male (p. 543). 
ce. Tail averaging shorter and relatively less deeply forked (average length 41.6, 
average depth of fork 19); rectrices more distinctly bronzy. (Bahamas.) 
Riccordia ricordii zeneoviridis, adult male (p. 544). 
bb. A velvety black spot on center of chest and breast. (Haiti.) 
Riccordia swainsonii, adult male (p. 546). 
