than the sixth, but a little longer than the seventh. 1 have introduced it in my plate, not for its claim to be deemed a species, but in order to 
render the representation of the members of this family obtained by Dr. Corns, in Arizona, as complete as possible. “It reaches, ’ writes my 
friend, “the latitude of Fort Whipple toward the latter part of April and remains until October, the precise time of its departure varying some- 
what with the state of the season. It is a common species in this locality, though not so abundant as V. Plumheus. The country affords the high 
open dry forests which it is fond of inhabiting, and which indeed seem a necessary condition of' its existence. Fine woods are much resorted to, 
as well as the groves of spreading cottonwoods, which border the water courses of the Territory. I have never seen it in shrubbery or tangled 
undergrowth, and doubt if it frequents these situations, which the white-eyed Bell’s and the Least Vireo are so fond of. Its song is sweet and 
melodious, hardly, if at all, differing from that of the warbling Yirco, to which it- is intimately related in most other points of habit. It pairs 
shortly after its arrival, and young birds are abundant in June. The latter speedily acquire a plumage which is almost indistinguishable from 
that of the adults, though the colors may be slightly brighter, and more decidedly yellowish beneath. Both old and young ofteu become 
exceedingly fat in the early fall, when their insect food is very abundant and easily secured.” 
Upper parts a dark olive. A white streak from the bill, above the eye. Below the eye white. Flanks washed with pale yellow ; rest of 
under harts pure white. Bill black : feet black. 
The figure is the natural size. 
VIEEO PUSILLUS 
LITTLE VIREO. 
YTBEO PUSILLUS. Corns. Froc. Acad. Nat, Scion,, (1860), p. 7G. 
YIREO PUSILLUS. ICuku. Rev, N. Am. Birds, p. 300. 
The present bird is an inhabitant of the southwestern portion of the United States, and the following account, furnished by Dr. Coves, con- 
tains all that is known of its habits. “ This is a rather common species of Lower and Southern California, and Arizona, at least during the sum- 
mer. It has not been observed to the north or east of the last mentioned country, and I believe it hardly reaches the northern boundary of that 
Territory. 1 never observed it at Fort Whipple, though it occurs in the lower country a few miles south or west of that locality. It appears 
chiefly a bird of the Colorado Talley, where Dr. J. G-. Cooper has found it. Mr. Xantus procured it at Cape St. Lucas. In its general habits it 
resembles the white-eyed Vireo ( V XovebQracenms) of the East, and particularly Bell’s Yirco (U. Belli) of the middle province, to which last it is 
most closely allied in form, size, and color. It appears to slum high open forests, and to be, like the two species just named, an inhabitant of 
thickets, copses, and clumps of hushes. It is a shy and timid species, and one rather difficult to observe or capture from the nature of the places 
it inhabits, which enable it readily to evade pursuit, by hiding in impenetrable brush. The song of the species is different from that of any other 
with which I am acquainted, though not without a certain resemblance to that of Bell's, The notes are very sweetly warbled, and skillfully 
modulated, producing an effect almost as pleasing as the soft strains of the warbling Yirco. It breeds in June, as I bad an opportunity of ascer- 
taining, though I was not fortunate enough to discover the nest. Upper mandible light bluish brown, which fades in drying into dull reddish 
brown. Iris brown. Legs and feet dull leaden blue. Dr. Cooper lias recorded this species from Fort Mojavo, under name of V. Belli, in the 
Proceedings of the California Academy of Natural Sciences, The latter species, so far as known, does not extend so far west.” 
Head ashy grey ; upper parts greyish olive. A narrow superciliary streak, white; as arc also the eyelids, two bands on the wings, and outer 
margins of wings and tail. Beneath pure white, faintly washed with greyish brown upon the breast. Bill has the upper mandible a light brown 
color ; lower mandible yellowish white. Feet bluish black. The figure is life size. 
The plant is the Nuttalia Malvadiora — Mallow — flowered Nuttalia, 
