244 PROCEEDINGS OF THE ACADEMY OF [June-Oct.^ 



19. Creciscus albigulaxis (Lawrence). White-throated Crake. 



Two males secured at Gatun, April 4, 1911, and April 14, 1912; 

 also a jet black downy young from the same locality, September 21, 

 1911, evidently only recently hatched. Adult: iris reddish-brown, 

 bill sooty-black above green on the sides and lighter below, feet 

 greenish-black. Young: iris black, bill white, feet brownish-horn. 



Found in heavy grass in dry field near a marshy flat. Bird had a 

 striking whistle of alarm and a "gathering call" when running similar 

 to that of the Bobwhite. 



20. lonornis martinicus (Linn). 



Female, Gatun Lake, July 9, 1911. Iris reddish-brown, bill bright 

 red with greenish-yellow tip and purplish-blue frontal shield, feet 

 yellow. 



Flushed from a small grassy island, dove when shot, but stayed 

 under water but a short time. 



HELIORNITHID^. 



21. Hehornis fulica (Boddaert). American Finfoot. 



Female, Gatun Lake, February 23, 1913. Iris brown, hds red, bill 

 red passing into white on lower part of the mandible, feet barred- 

 black and yellowish- white. 



A very shy bird. Its call is a peculiar "bark" of one to three notes. 

 This specimen was nearly ready to incubate. 



COLYMBID^. 

 f22.1 Colymbus dominicus brachyrhynchus Chapman. Mexican Grebe. 



LARID^. 

 *23. Hydrochelidon nigra surinamensis (Gmelin). Black Tern. 



Female, Gatun Lake, December 3, 1911. Iris brown, bill black, 

 feet blackish-brown. ' . 



*24. sterna hirundo Linnseus. Common Tern. 



]Male, shot from a flock, Gatun Lake, December 3, 1911, and a soli- 

 tarj^ female, from same locahty, June 9, 1912 (in Amer. Mus. Nat. 

 Hist.). Iris brown, bill black lighter at the tip and reddish at base, 

 feet light orange-brown. 



OHARADRIID^. 

 *25. Aegialitis semipalmata (Bonaparte). Semipalmated Plover. 



A pair from Toro Point, July 23, 1911, shot from a flock of eight on 

 the mud flats. Iris black, bill black with a narrow yellow-orange 

 band from the nostrils underneath the mandible in a half ring, feet 

 greenish-yellow. 



It was also present, August 4, 1912, and September 4, 1911. 



