424 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



Iris brown; base of bill dull greenish yellow, tip black; legs 

 greenish yellow. 



Measurements (from Ridgway, I.e., pp. 270-271). — Males, wing 

 137-146 (139.8), tail 59-65 (62.4), exposed culmen 26-29.5 (28.4), 

 tarsus 27-30 (27.7) mm. 



Females, wing 119.5-130 (125.8) ; tail 51-60 (55.3) ; exposed cul- 

 men 24-29 (25.8), tarsus 24-26.5 (25.8) mm. 



Passage migrant from the north. Fairly common in southward 

 flight in fall, mainly in October, seen less often in September; rare 

 in spring. 



There are sight records near Gatun on August 30 and September 

 1, 1934 (Arbib and Loetscher, Auk, 1935, p. 326), and at Fort 

 Amador on September 16, 1942 (Imhof, MSS field notes). Hasso 

 von Wedel secured specimens at Puerto Obaldia, San Bias, on Sep- 

 tember 25 and October 2 and 15, 1931, November 15, 1932, September 

 16 and 17, 1933, and September 21, 1934 (data from skins in the 

 Herbert Brandt collection at the University of Cincinnati). There is 

 a skin in the U. S. National Museum, forwarded by the Malaria Con- 

 trol Service, that was taken on the Pacific side of the Cerro Azul, 

 Province of Panama, on October 11, 1955. There are numerous other 

 records for October. The only reports during the northward flight 

 are of one seen by C. O. Handley, Jr., May 30, 1959, on the old air- 

 strip at Mandinga, San Bias, and others noted by Eugene Eisenmann, 

 April 28, at Puerto Pilon, Colon, and on May 1 1 at Coco Solo, Canal 

 Zone, both in 1961. 



In migration these sandpipers usually are found in fresh-water 

 marshes or wet meadows and also come to pools of water left by 

 rains on such open areas as parade grounds or golf links. Most of the 

 reports to date have come from the Canal Zone. Hellmayr and Con- 

 over (Cat. Birds Amer., pt. 1, no. 3, 1948, p. 194) have recorded one 

 from Frances, in Chiriqui, but this seems to be in error, as Emmet 

 Blake informs me that there is no specimen from that place in the 

 Chicago Natural History Museum. 



EROLIA ALPINA PACIFICA (Coues): Dunlin; Correlimos Comlin 



Pelidna Pacifica Coues, Proc. Acad. Nat. Sci. Philadelphia, vol. 11, 1861, p. 189. 

 (Simiahmoo, Washington.) 



The dunlin is a short-legged bird, slightly larger and heavier in 

 body than the spotted sandpiper, with a bill decidedly longer than the 

 head, rather heavy, and slightly, but noticeably, curved downward 

 near the tip. 



