92 
NORTH AMERICAN BIRDS. 
Tail rounded, inner webs of tail-feathers mostly rufous. Lateral tail- 
feather abruptly narrower than the rest 
0. floresi. 
Tail forked, inner webs of tail-feathers without rufous. Lateral tail- 
feather abruptly narrower than the others C. anna ; C. costce. 
Tail emarginated, inner webs of tail-feathers without rufous. Lateral 
tail-feather not narrower than the others 
C. helence. 
II. Bill bare of feathers between the nostrils. 
C. Top of head bluish-black ; a white line through eye. 
Metallic feathers of side of throat not elongated. 
Tail nearly even, and slightly emarginated. Lateral feathers very 
Heliopcedica. 
broad and obtuse at end 
“ Genus STELLULA, Gould. (Page 91.) 
B. calliope. Above green; beneath white, tinged with rufous laterally. £. Throat- 
feathers elongated, the terminal half violet-red, the basal portion pure white. Tail-feathers 
plain dusky, edged with rufous toward the base. 9 • Throat white, sometimes spotted 
dull-green. Tail-feathers greenish toward base, and tipped with white. Wing, about 1.60 ; 
tail, .90; bill, .55. Hab. Western Province of United States, from Pacific coast (Fort 
Tejon to British Columbia), eastward to East Humboldt Mountains. {Mountain Star.) 
Genus TROCHILUS, Linn^us. (Page 91.) 
Common Characters. Above and on the sides metallic green. A ruff of 
metallic feathers from the bill to the breast, behind which is a whitish collar, 
confluent with a narrow abdominal stripe ; a white spot behind the eye. Tail- 
feathers without light margins. 
T. colubris. Tail of 9 deeply forked (.30 of an inch). Throat bright 
coppery-red from the chin. Tail of 9 rounded, emarginated. Length, 
3.25; wing, 1.60 ; bill, .65. Hab. Eastern North America, south to Brazil. 
( Ruby -throated Humming-Bird.) 
T. alexandri. Larger. Tail of $ slightly forked (.10 of an inch). Throat 
gorget with violet, steel green or blue reflections., behind ; anteriorly opaque 
velvety-black. Tail of 9 graduated ; scarcely emarginated. Length, 3.30 ; 
wing, 1.70; bill, .75. Hab. Western United States, from Pacific coast to 
Wahsatch Mountains. {Black-chinned Hummer.) 
Genus CALYFTE, Gould. (Page 91.) 
A. No rufous on tail-feathers ; tail forked or emarginated. 
Lateral tail-feather abruptly narrower than the others. Rump and middle 
1 tail-feathers green. 
1. C. anna. Length, 3.60 ; wing, 2.00 ; bill, .82. Outer tail-feather 
with a double curve, the end inclining outward. Metallic hood and 
ruff of the male purplish-red. Hab. Mexico and California. (Anna 
Humming-Bird.) 
2. C. costae. Length, 3.20; wing, 1.75; bill, .68. Outer tail-feather 
with a simple curve, the end inclining inward. Metallic hood and ruff 
of the male violet-blue. Hab. Mexico into Southern Arizona and 
California. (Ruffed Humming-Bird.) 
