17R SYNOPSIS OF THE TROCHTLIDiE. 
11. P. Mazepfa, Mazeppa Humming-Bird. — Colibri Ma- 
zeppa, Less. Troch. iii. Above golden-green, be- 
neath pale chestnut ; tail uniform chestnut, barred 
with black at the tip, centre feathers golden-green. 
Inhabits French Guiana. 
Pi.. XXX.. Von. II 12. P. Swainsonii, Swainson’s Hum- 
ming-Bird. Colibri Swainsoii, iess. Uroch. Ixvi. 
Golden-green above; beneath, chestnut-red; tail 
even, chestnut, barred with black and tipped with 
white. Inhabits Brazil. 
13. P. LEUCDKiis, Wliite-tailed Humming-Bird Lath. 
Trochilus leucurus. Less. O. M. xx. Above golden- 
green ; throat with a patch of chestnut ; breast gol- 
den-green ; beUy and vent grey ; tail white, except 
the centre feathers which are green. Inhabits 
Dutch Guiana, Surinam. 
14. P..° SIMPLEX Colibri simple. Less. Col. xxiii. 
Golden-green above, beneath chestnut; the throat 
indistinctly in the form of a gorget, purplish; vent 
white; tail nearly equal, but rather hollowed in the 
centre, black, outer feathers tipped with white. 
This seems to be a bird in immature plumagej and more allied 
to Cynanthus. Trochilus multicolor, weliave every reason 
to think, is a made-up specimen, but would stand here. 
15. P. ? CHRYSURUS, Yellow-tailed Humming-Bird — 
Oiseau-mouche chrysure, Ornismya chrysura. Less. 
O. M. sup]}, iv. Uniform golden-green ; tail red- 
dish-yoUow, deeper at the tip, rounded. Inhabits 
Brazil. 
16. P. ? AMAZiLi. — Orthorhynchus amazili, Less. Zool. de 
la Cog. xxxi. Crown, throat and breast, emerald- 
green ; upper parts golden-green ; vent reddish- 
yellow ; tail bright chestnut, nearly square. Inha- 
bits Peru. 
The last bird is descril>ed as new in Lesson's Zoolotfie de la 
Coquile, and, with the preceding one, is introduced here in 
iloubt. They shew a strong alliance to both this form and 
Cynanthus. 
Pl. I. VoL. I 17. P. N,«vius, Spotted Saw-billed Hum- 
ming-Bird. — Colibri tachetd, Temm. Ramphodou 
