Thalurania belli, sp,nov., Verrill ; Bell’s Hummingbird, 
Adult male; Jpper parts rich iridescent metallic green, becom- 
ing deep peacock blue or verdite-green on forehead and crown ; 
coppery on shoulders and deep b! uish or emerald green on rump: 
scapulars, upper wing coverts and upper tail coverts, deep pea- 
cock or bluish green. Wings metallic purple or Steel blue, the 
outer web of outer primary narrewly edged with white or pale 
ash gray. 
Basal portion of tail dull copper green, the outer half deep 
steel Llue with violet reflections. ‘The three outer feathers on 
each side broadly tipped with white and the outermost feather 
white at base also, Lower parts uniform snow white more or less 
washed with grayish on flanks and sides. Flanks and sides be- 
neath wings spotted with isolated bright green feathers. Har 
coverts and loral region deep velvety black in marked contrast to 
green of occiput. Bill dusky black with lower mandible slightly 
lighter near base. 
Adult temale; Much like male but rather duller and more 
uniform in colour, ‘Tertiaries and sometimes one or two of the 
secondaries, slightly tipped with white, Black loral patch less 
distinct than in male and usually more or less glossed over with 
dull greenish. Lower parts dirty or grayish white, distinctly 
ashy on flanks and sides, Sides of chest, flanks and sides be- 
neath wings, heavily spotted with green ; the spots often becoming 
confluent. Bill entirely dusky black. 
Young male; Almost exactly like female and often indis- 
tinguishable except by dissection. Usually brighter above with 
more distinctly coppery reflections on shoulders and more bluish 
on head and rump with feathers slightly tipped with rusty. 
Lower parts usually whiter with less dusky and more green on 
sides and flanks. Loral patch more distinct than in female, 
Length 3.75 to 4,15. Wing 2.40 to 2.70. Tail 1,35 to 1.50, 
Culmen 0,70. 
Nest a beautifal structure of felted tree-fern down, orna- 
mented with spider webs, beetle elytra, and bits of blue green 
lichen ; usually saddled to a slender branch or twig from 10 to 
30 feet above the earth and. preferably overhanging some moun- 
tain stream, 
Eggs elliptical, dead white, .46 x. .30 to .48 x. .32. 
This new and beautiful species, which I have named in honor 
of the Hon. H. Hesketh Bell, Administrator of Dominica, is con- 
fined to the higher mountains of Dominica at an elevation of 
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