42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



This is the race that breeds at the Galapagos Islands and that is 

 known mainly from that area. 



PUFFINUS PACIFICUS CHLORORHYNCHUS Lesson: Wedge-tailed Shear- 

 water; Pardela del Paclfico 



Puffinus chlororhynchus Lesson, Traite d'Orn., livr. 8, June 1831, p. 613. (Shark 

 Bay, Western Australia.) 



Like the sooty shearwater, but tail longer, wedge-shaped, with the 

 lateral feathers much shorter than those in the center. 



Description. — Length 440-470 mm. Dark phase, blackish brown 

 above ; grayish brown on under surface, including the under wing 

 coverts ; throat somewhat lighter. 



Light phase, white from throat to under tail coverts, including 

 under wing coverts ; sides gray. 



Measurements (from Loomis, Proc. California Acad, Sci., vol. 2, 

 pt. 2, 1918, p. 145).— Males (17 specimens), wing 289-309 (299), 

 tail 129-148 (138), culmen 36.6-41.2 (39.1), tarsus 41.4-48.2 (46.6) 

 mm. 



Females (30 specimens), wing 287-311 (298), tail 128-145 (138), 

 culmen 36.6-42.1 (38.9), tarsus 43.8-48.1 (46.0) mm. 



Casual visitor. One record off the Pacific coast of southern Darien. 



Dr. Robert Cushman Murphy has permitted me to include the 

 only record for this species, based on two specimens that he collected 

 on March 5, 1941, at sea 5 kilometers northwest of Ensenada Guayabo, 

 during the Askoy Expedition. The locality is offshore to the south 

 of Jaque, Darien, a short distance north of the Colombian boundary. 



The race chlororhynchus, under present understanding of the 

 populations of this shearwater, nests on islands off Australia, at Lord 

 Howe and Norfolk Islands, and at the Seychelles in the Indian Ocean. 

 In the eastern Pacific it breeds on San Benedicto, in the Revilla 

 Gigedo group, off Baja California, 



One of the two birds taken is in dark phase, and the other in 

 light phase plumage. 



Family HYDROBATIDAE : Storm Petrels; Painos 



Three species of this family reach the Pacific waters off Panama 

 during wanderings from their breeding grounds, one of them, Oceano- 

 droma tethys, coming from the northwestern coast of South America, 

 and the other two, Loomelania melania and Halocyptena microsoma, 

 from islands near Baja California. Northern and southern groups 

 thus range together in this intermediate area. 



