Vor. II, Pt. 11] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 205 
11. Hirundo erythrogaster: AMERICAN BARN SWALLOW 
Charles, Chatham, and Hood islands. 
We met with this swallow only at Black Beach Roads, 
Charles, where several were noted flying about the shore on 
October 11 and 12. 
At Cocos Island, Costa Rica, it proved to be more numer- 
ous, for on the 5th of September I saw some 20 of them 
flying about the top of a hill above Chatham Bay. On Sep- 
tember 2 Mr. Beck captured one at sea about 40 miles south 
of the island during a calm. 
12. Progne concolor: GALAPAGOS MARTIN 
Albemarle, Barrington, Charles, Chatham, Daphne, Dun- 
can, Eden, Indefatigable, James, and Seymour islands. 
We did not meet with this species on either Duncan or 
Barrington, although it has been reported by other observers. 
It seemed to be commonest on Albemarle, but was not partic- 
ularly abundant anywhere. 
They were observed in every region: the arid, the forested 
humid, the bare mountain tops, and also about the seashore 
and saline coastal lagoons. 
On Charles several were met with on October 7, on the 
main peak above 1500 feet in the bald, shrubless and treeless 
region. Two days later Mr. Hunter took three in the inte- 
rior. On our visit to Black Beach Roads, Charles, in latter 
May and early June, individuals were observed several times 
low down in the arid region, in the forested humid interior, 
and on the bald mountain top. One, which was noted flying 
over the tree tops in the interior basin of the island and which 
was taken May 24, had slightly enlarged reproductive organs. 
The first specimen from Chatham was taken in the Wreck 
Bay region by Mr. Beck, October 17. On February 12 I 
noted several around the topmost pinnacle of Finger Point, a 
high and very precipitous promontory on the north central 
coast of the island. On February 22, a few were seen in the 
upper pasture country above the village of El Progreso. 
Several were seen in the humid forested country on the 
south slope of Indefatigable, above Academy Bay, about the 
middle of November. While on a four days’ trip inland from 
