August, 1897 . 
Land-Birds Observed on San Clemente Island. 
15 
7. Aeronautes melanoleucus —White—throated Swift. 
During the first visit, White-throated Swifts were seen frequently 
flying along the hillsides. I saw them entering crevices in the 
roof of one of the caverns west of the Cove, on April 2. They 
were probably nesting. Two were shot on April 2, but fell in 
cholla cactus thickets and were not secured. 
8. Calypte costa —Costa’s Hummingbird. 
I saw a single adult male poising among some flowers on March 
30. It was undoubtedly a migrant. 
9. Selasphorus alleni —Allen’s Hummingbird. 
Quite numerous along the ravines, where the metallic rattle of 
its wings gave notice of its presence long before it could be dis¬ 
tinguished among the bright-colored flowers. I found a nest 
on March 28, which contained two incubated eggs. It was 
built at the forks of a cherry twig, five feet above the ground, 
in a canon. The nest is composed mostly of sheep’s wool, with 
spiders’ web and a few downy feathers. On the outside, it is 
covered with green lichens, and bits of plant fibers. The inside 
measurements are: diameter, .90; depth, .75. Outside: diame¬ 
ter, 1.90; depth, 1.50. The eggs measure: .54X.35, .55X.36. On 
May 31 and June 3, I saw fully-fledged juveniles. They had 
a shrill squeak, which they uttered frequently, especially when 
the parent bird was approaching to feed them. Four specimens 
of the Allen’s Hummer were secured. 
10. Contopus richardsonii —Western Wood Pewee. 
I saw a single individual of this species in a canon on June 3. I 
I am sure it was a migrant, though late. 
11. Empidonax insulicola — # Island Flycatcher. 
On June 5, I secured a pair of these birds. They were in a 
deep, dark gorge, flitting about the face of a mossy wall where there 
was probably a nest, though I failed to find it. Along the pre¬ 
cipitous north side of the island in the vicinity of Mosquito 
Harbor, several were noted on June 7. As far as I could judge, 
the notes and mien of the Island Flycatcher were in no way dif¬ 
ferent from those of the mainland bird. As I did not observe 
any of these birds on my first visit, it may be presumed that 
they are only summer visitants, as is E. difficilis on the main¬ 
land. 
*Ne\vSpecies, described in Auk , July, 1897, by Harry C. Oberholser. 
