462 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



ANGUS STOLIDUS STOLIDUS (Linnaeus) 



Sterna stolida Linnaeus, Syst. Nat., ed. 10, vol. 1, 1758, p. 137. (West Indies.) 



Characters. — General color lighter, and browner ; crown paler gray, 

 becoming definitely white on the forehead; average size slightly 

 smaller. 



Measurements (from Ridgway, I.e., p. 547). — Males, wing 261.5- 

 273 (268.1), tail 139-148 (144), exposed culmen 41-44.5 (43.4), 

 tarsus 23.5-25.5 (24.4) mm. 



Females, wing 259-266 (263.3), tail 137.5-140 (138.2), exposed 

 culmen 39.5-42 (40.5), tarsus 23-24.5 (23.6) mm. 



The only records are of a male in the American Museum of Natural 

 History, taken by R. R. Benson at Cocoplum, Bocas del Toro, No- 

 vember 2, 1927, and of an immature male in the Herbert Brandt Col- 

 lection secured by Wedel at Puerto Obaldia, San Bias, August 10, 

 1934. 



The nearest breeding colony that has been recorded is at Serrana 

 Bank in the Caribbean northeast of Isla de San Andres. 



ANGUS STOLIDUS RIDGWAYI Anthony 



Anous stolidus ridgwayi Anthony, Auk, vol. 15, no. 1, 1898, p. 36. (Isla Socorro, 

 Islas Revilla Gigedo, Mexico.) 



Characters. — General color darker, with the crown darker gray ; bill 

 somewhat heavier through the gonydeal angle. 



Measurements. — Males (4 from Cocos Island), wing 279-292 

 (286), tail 155-167 (163), exposed culmen 40.2-42.5 (41.3), tarsus 

 25.0-26.9 (25.8) mm. 



Females (6 from Clipperton Island), wing 265-281 (270), tail 

 146-162 (154), exposed culmen 38-42 (39.6), tarsus 24-24.5 (24.1) 

 mm. 



Apparently breeds on Los Frailes. Status uncertain. 



Mrs. Sturgis (Field Book Birds Panama Canal Zone, 1928, p. 105) 

 has written that she saw many noddies flying off Isla Chepillo, in 

 Panama Bay, in March 1926. Fleming (Emu, vol. 49, Jan. 1950, 

 p. 177) recorded a noddy in the Gulf of Panama, resting on floating 

 drift, on July 20, 1948. The only other report is from an interesting 

 photograph, given to me by Harry L. Peck of Tonosi. This was made 

 on May 6, 1949, by a party from the Gorgas Memorial Laboratory 

 during a journey by launch to the southern end of the Province of 

 Los Santos. The picture shows a swarm of terns leaving one end 

 of the larger rock of Frailes del Norte south of Punta Mala. Though 



