NO. 9 BIRDS OF ISLA COIBA, PANAMA—WETMORE 15 
appears somewhat different from Batty’s usual preparation so that 
he may have obtained it from some other source, perhaps from the 
collector Enrique Arcé, with whom Batty must have had contact. 
The forests of the western side of Coiba have still to be examined 
for their birds. There is a possibility that there may be further 
resident species in that area. 
Family PopIcIrEDIDAE: Grebes 
PODICEPS DOMINICUS BRACHYPTERUS (Chapman): Least Grebe, Tigua 
Colymbus dominicus brachypterus CHAPMAN, Bull. Amer. Mus. Nat. Hist., 
vol. 12, Dec. 23, 1899, p. 256. (Lomita Ranch, lower Rio Grande, Tex.) 
On January 13 a prisoner brought me a live young least grebe that 
he had captured on a small lagoon beyond Catival. The following 
day we visited this locality and found several of these birds floating 
about on a small pond in which there was considerable aquatic growth. 
Adept at concealment, they dived and disappeared, but by careful 
watching we were able to get an occasional glimpse of one under the 
cover of the taller water plants. 
I have realized for several years that these grebes fly about a good 
deal from one body of water to another, probably at night, but this 
occurrence on Coiba was a definite surprise. It is probable that the 
lagoon in which they lived would be dry before the end of the summer 
season so that they might be under necessity of crossing to the main- 
land. We secured an adult female, one young fully grown but with 
the throat and lines on the side of the head white, and another half 
grown. The adult, in full breeding plumage, agrees in color and 
size with birds from Central America and México. Its measurements 
are as follows: Wing 90.0, culmen from base 22.7, tarsus 33.8 mm. 
Countrymen in Panama usually call any species of grebe a patico. 
Family HypropaTiIpAE: Storm Petrels 
OCEANODROMA TETHYS KELSALLI (Lowe): Galapagos Petrel, Golondrina 
de Mar Galapaguefia 
Thallassidroma tethys kelsalli Lowe, Bull. Brit. Orn. Club, vol. 46, Nov. 4, 
1925, p. 6. (Pescadores Islands, off Ancon, Pert.) 
William Beebe informs me that he secured one of these petrels 
that came on board ship at night on March 20, 1938, while on Banco 
Hannibal, west of Coiba. The bird was attracted by lights that he 
was using to lure and collect marine life.* There are three specimens 
# See Beebe, Book of Bays, 1942, pp. 280, 297. 
