COLLECTION OF HUMMIXGBIRDS—OBERUOLSER. 3-11 
CALLIPHLOX MITCHELLII (Bourcier). 
Trochilus mitchelUi BovRCiER, Proe. Zool. Soc. Loml., 1S47, i>. 47. 
Calliphlox mitcheUi GovhD, Mon. Troch., Ill, 1860, pi. cl.\. 
Seven specimens, from Milligalli and Gualea, west Ecuador, and 
Baeza, east Ecuador. The single male from the east side of the 
mountains is considerably smaller than corresponding individuals 
from the west side; but as no eastern adults are available, proper, 
comparisons can not be made. Four immature males differ from an 
adult female in being less uniformlj' rufous-chestnut below the ante- 
rior portions being much lighter, even whitish. 
CHAETOCERCUS MULSANTI (Bourcier). 
Omismya mulsanti Boubciek, Ann. Sc. Phys. et Xat. Lyon, V, 1842, jx 344, pi. xx. 
Chaetocercus mulsanti Cabanis and Heine, Muf?. Hein., HI, 1860, p. 60. 
Twenty-four specimens, from the following localities: Corazon, 
Pichincha, Jombaco (vallev of Chillo, near Quito), west Ecuador; and 
Papallacta, east Ecuador. There seems to he no constant difference 
between these and Colombian specimens. Birds from both sides of 
the mountains appear to be identical. The immature male differs from 
the adult female in the lack of rufescent tinge on the anterior lower 
parts, in the less extent of rusty on the abdomen, and in the buff'y or 
ochraceous instead of rufous or chestnut shade of the crissum and tips 
to the tail-feathers. One of the young males appears to be abnormal 
in having the throat of a brownish gray shade instead of white, 
though this condition is indicated in one or two other specimens. 
Found feeding chiefly on the flowers of the guava tree and in rather dry, sandy 
localities. Adult males always seemed very scarce, but immature males and females 
were fairly numerous in certain parts of the Chillo Valley in December and January. 
Local name, "Soldado." 
POLYXEMUS BOMBUS (Gould). 
Chaetocercus hombiis Gould, Proc. Zool. Soc. Lond., 1870, pp. 803, 804. 
Polj/.remus ho.nhus Mulsant and Verreaux, Hist. Nat. Ois.-Mouches, IV, 1877, 
p. 123, pi. CXI. 
Four specimens, from Guayaquil and Santo Domingo, west Ecuador. 
An immature male is practically identical in plumage with the adult 
female. 
Mr. Hartert is undoubtedly right in merging CJiaetocerciisviith Aces- 
trura^ for C. jourdanii^ the type of the former, is undoubtedly con- 
generic with C. iindsanti^ the type of the latter. The present species 
is, however, by reason of its very short wings and narrow, lengthened 
tail feathers, genericall}' distinct from the species with which it has 
commonly been associated. 
Found feeding just before dusk on the orange flowers at Santo Domingo. They so 
exactly resemble the hawk moths also seen around the flowers at the same time that 
