TROCHILUS. 313 
f?. Lateral tail-feather in adult male not distinctly narrower 
than the rest; rump and upper tail-coverts metallic 
blue (in both sexes). 
Adult male: Head, including ruff, metallic purplish 
red; length about 2.50, wing 1.10-1.15, tail .65, 
culmen 40. (Female slightly larger.) Hab. Cuba. 
T. helene (GuNDL.). Princess Helena’s Hummingbird. 
e. Tail with more or less of rufous, more or less graduated (mid- 
dle feathers longest, or equal to longest) in both sexes; 
adult males with top of head greenish or bronzy, totally 
different from color of gorget (except in 7. floresii). (Sub- 
genus Selasphorus Swatns.) 
Jf’. Middle pair of tail-feathers entirely green ; gorget of adult 
male soft, rather light, rose-purple, or solferino; wing 
more than 1.90. 
Adult male: Tail-feathers, except middle pair, dull 
purplish black, the next to middle pair distinctly 
edged with rufous (the next pair sometimes nar- 
rowly edged with same); length about 4.00-4.25, 
wing 1.92-2.05, tail 1.40-1.60, exposed culmen .62- 
70. Adult female: Three outer tail-feathers rufous 
at base and broadly tipped with white, the inter- 
vening space blackish, with some green next to 
rufous on second and third feathers; fourth feather 
green to extreme base, but edged with rufous and 
marked by a large terminal or subterminal spot 
of black ; length about 4.10-4.70, wing 2.00-2.10, 
tail 1.45-1.50, exposed culmen .70-.72. Eggs .50 
X 383. Hab. Rocky Mountains of United States, 
north to Wyoming, Montana, and Idaho Territo- 
ries, west to Sierra Nevada (?), south over table- 
lands of Mexico to highlands of Guatemala. 
432. T. platycercus Swans. 
Broad-tailed Hummingbird. 
Jf?. Middle tail-feathers partly rufous; gorget of adult male 
intensely brilliant metallic fire-red, changing to orange, 
brassy green, and crimson, the feathers much length- 
ened laterally and posteriorly ; wing less than 1.90. 
g'. Adult males with top of head dull bronzy or green- 
ish, the middle tail-feathers rufous, marked on ter- 
minal portion with a dusky mesial streak, the outer 
feather with inner web entirely rufous, the belly, 
1 Orthorhynchus helene “ GuNDL., sus manuscritos,” Lems., Aves de la Isla de Cuba, 1850, 70, pl. 10, fig. 2. 
Calypte helene Gouup, Mon. Troch. iii. pl. 126. 
