40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



have been an egg here that I did not locate. One egg seen lay in a 

 depression beneath some roots with no bird near. All the birds were 

 silent, the only indications of their presence being a few scattered 

 feathers and droppings and the strong shearwater scent. It required 

 an hour and a half to secure the specimens mentioned, when the wind 

 began to freshen, so that I had to leave without exploring the island in 

 detail. It is possible that there are other colonies on adjacent islets, 

 or elsewhere along the coast. 



Because of smaller size, I have separated these Panamanian birds 

 as the subspecies loyemilleri, named for Loye Holmes Miller, who 

 first discovered them. The wing measurement varies from 185 to 195 

 mm., compared to 193 to 210 mm. in Puffinus Iherminieri Iherminieri. 

 There are no differences in color. 



In addition to the specimens from Tiger Rock, there are two males 

 in the U. S. National Museum from 10 miles off Punta Valiente, taken 

 May 30, 1962, by H. R. Bullis, Jr., and P. Struhsaker. Wedel 

 secured two at Puerto Obaldia, Comarca de San Bias, January 31 

 and June 22, 1934, which came to the Herbert Brandt Collection 

 now in the museum of the University of Cincinnati. 



The 5 eggs that I was able to prepare ranged from fresh to 

 heavily incubated. They are pure white, with the shell slightly 

 pitted, and vary in shape from subelliptical to long subelliptical and 

 long oval. The measurements are 48.3-53.9x34.5-36.3 with the 

 average 51.8x35.2 mm. Bent (U. S. Nat. Mus. Bull. 121, 1922, pp. 

 74-75) gives the following dimensions for the eggs of P. I. Iherminieri: 

 49.2-57.3x34.0-40.8 mm.; average 52.5x36.2 mm. The eggs of 

 the newly described race, as well as the birds, thus average slightly 

 smaller. 



In the original description of the form of the coast of Bocas del 

 Toro I overlooked one record of the species for the Caribbean area. 

 Cory (Auk, 1887, p. 181) listed Audubon's shearwater among birds 

 collected at Isla de Providencia by Robert B. Henderson "during the 

 winter of 1886-87." Bond (Proc. Acad. Nat. Sci. Philadelphia, vol. 

 102, 1950, pp. 52-53) during a visit on April 28, 1948, found that 

 the colony was located on Crab Cay off the northeastern coast. Emmet 

 R. Blake of the Chicago Natural History Museum has lent for 

 examination the 10 specimens taken by Henderson on March 12, 

 1887. Two are downy young, one of them recently hatched. Two 

 of the adults have the tips of the primaries too badly worn and 

 abraded to give an accurate indication of size, and a third has the 

 wing in molt. The 5 remaining vary in length of wing from 195 



