290 
REPORT OF THE CHIEF OF ENGINEERS. 
G. macgillivrayi Bd. Macgillivray’s Warbler. 
Fairly numerous in summer along the eastern slope. I find no reference to the species 
in my note-book as occurring farther north than Northern California. As, however, 
according to Cooper and Suckley, it reaches to Puget Sound along the coast, it is sate 
to infer that on the eastern slope it passes the Columbia River into Washington Ter¬ 
ritory. 
A nest found July 24 contained four young a few days old. 
Icteria Vieillot. 
J. virens longicauda (Lawr.). Western Yellow-breasted Chat. 
A rather common summer visitant about Carson, Nev., but becoming less so to the 
northward, until, in extreme Northern California, it is quite rare. 
Myiodioctes Audubon. 
M. pusillus (Wils.). Wilson’s Black Cap. 
As a summer resident of the eastern slope the species appears to be rare; it may, 
however, be more common at this season towards the Columbia River than farther south. 
June 24 I saw a female of this species in an alpine valley of Northern California, at 
an elevation of about 6,000 feet. Her excitement at my presence convinced me that 
her nest was near by; but circumstances not favoring a long search, I failed to dis¬ 
cover it. In fall the species is comparatively common. 
TANAGRID.E—Tanagers. 
Pyranga Vieillot. 
P. ludoviciana Wils. Crimson-headed Tanager. 
A common summer resident of the eastern slope as far to the north at least as the 
Columbia River, and without doubt reaching into Washington Territory. 
HIRUNDINIDiE—Swallows. 
Hirundo Linnaeus. 
H. erytlirogastra Bodd. Barn Swallow. 
A numerous summer resident of the lowlands. 
Tachycineta Cabanis. 
T. bicolor (V.). White-bellied Swallow. 
This is a more or less abundant inhabitant of the eastern slope, according to cir¬ 
cumstances. It was not met with farther north than Northern California. Herein 
the mountains near Camp Bid well it was numerous enough the last of July, at which 
time the pairs all had young, as was shown by their frequent visits to woodpeckers’ 
holes in the aspens. 
T. thalassina (Sw.). Violet-green Swallow. 
This is an extremely abundant summer visitant in certain portions of Eastern Cali¬ 
fornia and Western Nevada, as, for instance, at Pyramid Lake. The pyramid-like 
cliffs which give name to this body of water form the abode of thousands of these 
beautiful swallows, which resort to the niches and holes in the faces of the rock for 
nesting sites. 
In the mountains, where it is also abundant, it selects for this purpose the deserted 
holes of woodpeckers, giving everywhere marked preference to those in oaks. It is 
almost always found in close proximity to water. 
A nest found July 1 contained five young and two unfertile eggs. 
Petrochelidox Cabanis. 
P. lunifrons (Say). Cliff Swallow. 
By far the most abundant and generally distributed of the family. 
