312 
REPORT OF THE CHIEF OF ENGINEERS. 
in both instances, and that the Lake Tahoe birds were the Stellulo, as tbe Cascade Mount¬ 
ain birds proved to be. It is to be remarked that the young of several of the bummers 
are really so much alike, especially those of calliope and rufus, that a very careful com¬ 
parison, which is rarely possible in the field, is necessary to distinguish them. 
Trociiilus Linmeus. 
T. alexandri , Bourc. and Muls. Black-chinned Humming Bird. 
This species appears to be a by no means common summer resident along the eastern 
slope, and to have there a limited distribution. It was observed and specimens were 
procured in June in Eastern California along Honey Lake. I arther north, in the 
mountains near Camp Bidwell, the species was present in July. 
Selasphorus Swainsou. 
S. rufus , (Grnel.). Rufous-backed Humming Bird. 
This hummer is probably rather local as a summer resident of the eastern slope. In 
the summer of 1876 I did not find it breeding in Eastern California, although plentiful 
enough there in fall. It appeared to be rather numerous in summer near Camp Bidwell. 
i 
ALCEDINIDiE—Kingfishers. 
Ceryle Boie. 
C. alcyon (L.). Kingfisher. 
Of common occurrence on all the fish-stocked streams. 
PICIDiE—Woodpeckers. 
Hylotomus Baird. 
H.pilcaius (L.). Pileated Woodpecker. 
The “ log cock ” was not noted by our party at any point along the eastern slope 
notwithstanding that the heavily timbered mountains would appear to favor its pres 
ence. On the Columbia, to the west of the divide, it was said by the lumbermen to be 
a numerous and constant resident. I shot a fine male, the only one seen, at the Cas¬ 
cades, in October. 
PiCUS Linnaeus. 
P. villosus liarrm (Aud.). Western Hairy Woodpecker. 
Numerous as a resident of the pineries. 
P. pubescens gairdneri (Aud.). Western Downy Woodpecker. 
Along the eastern slope, as everywhere throughout the middle region, this is a rare 
species, aud but a single individual was seen—in Chewaucan Valley, in August. 
P. albolarvatus (Cass.). White-headed Woodpecker. 
This woodpecker appeared to be less common everywhere along our route to the 
north than in the pineries immediately west of Carson. It occurs nevertheless here 
and there as a resident. 
Picoides Lac^pede. 
P. arcticus (Sw.). Arctic Woodpecker. 
A rather common and constant resident of the pine woods from Carson northward 
into Oregon. 
Sphyrapicus Baird. 
S. varius nuclxalis (Bd.). Red-naped Woodpecker. 
This middle region form extends across from the Rocky Mountains, and occurs in 
summer along the eastern slope. Beyond this we have no evidence of its presence it 
being replaced upon the west coast by the following bird. ’ 
al ’ ul ^ es to th . e fact ^at in tIie region between the Rocky Mountains 
and the Cascade Range spemmens of this form give evidence, by the admixture of red 
in the black auricular stripe, the black pectoral collar, and in the white area surround- 
