AGYRTRIA CÆ RULE I CE PS.
Blue-headed Emerald.
Thaumatias caruleiceps, Gould, Proc. Zool. Soc. 1 8 6 0 , p. 3 0 7 .— Id. Intr. Trochil. 8vo,
p . 1 5 2 (1 8 6 1 ).— Mulsant, H ist. N a t. Ois.-Mouches, i. p. 2 4 0 (1 8 7 4 ).— Elliot,
Ibis, 1 8 7 8 , p. 52.
A g y rtria ceei'uleiceps, E llio t, Synopsis o f the Humming-Birds, p. 2 0 6 (1878).
The present species belongs to the section of the genus Agyrtria in which the throat and breast are
metallic green. It is allied to A. nitidifrons, but differs in having the crown o f the head and back of
the neck shining greenish blue. It comes from Colombia, and the types are in the Gould Collection.
The following is the original description of the species:—
“ Crown o f the head and back o f the neck deep shining greenish blue;; back and shoulders green,
passing into bronzy green on the rump and upper tail-coverts; tail nearly uniform bronze, with a very
faint indication o f a zone o f brown across the outer feathers near the t ip ; wings purplish brown ; sides
of the neck glittering bluish green, the blue tint predominating on the ear and immediately under
the ey e; centre o f the throat and chest broken glittering green and white; flauks bronzy green; under
tail-coverts grey, with brown centres ; upper mandible dark brown ; under mandible yellow, except the tip,
which is dark brown. Total length 3 i inches, hill H, wing 21, tail i ”
[R. B. S.]
AGYRTRIA FLUVIATILIS.
Riverine Emerald.
Thaumatias flu v ia tilis, Gould, In tl. Trochil. 8 vo, p. 1 5 4 (1 8 6 1 ).— Scl. & Salv. Proc. Zool.
Soc. 1 8 6 6 , p. 1 9 4 .— lid . Nom en c l. Av. Neotr. p. 9 2 (1873).— Elliot, Ibis,
1 8 7 8 , p. 5 1 .— Mulsant, H ist. N a t. Ois.-Mouches, i. p. 2 5 3 (1874).
A g y r tria flu v ia tilis , H ein e , Journ. fur Orn. 1 8 6 3 , p. 1 8 4 .— Elliot, Synopsis o f the Humming-
Birds, p. 2 0 7 ( 1 8 7 8 ) » T a c z . Om. Pérou, i. p. 4 0 4 (1884).
’he present species is placed, according to the arrangement set forth by Mr. Elliot, in the section of
he genus in which the crown of the head is doll green, and the under tail-coverts white with a central
trealt of brown or green. It differs from all its near allies in having a black tail, and the throat and
reast grass-green with a slight bluish tinge.
The original specimens are in the Gould Collection, and were received from the K.o Napo. It was
fterwards met with by Mr. Edward Bartlett on the Lower Ucayali at Ynrtmagnas, and Mr. Hanxwell has-
ent specimens from Pehas. Mr. Stolzmann has likewise met with the species at Yurtmaguas.
The figures in the Plate have been drawn from a male bird procured in the latter locality, and lent