74 Zoologica: N. Y. Zoological Society. [I; 3 



Order PROCELLARIIFORMES. 



Oceanites oceanicus (Kuhl.). Wilson Petrel. 



A single individual was blown by the storm into the quiet 

 waters of the Cano San Juan when we entered the mangroves on 

 March 25th. It flew close to the sloop and alighted twice on the 

 water. 



Order LARIFORMES. 



Phaethusa magnirostris (Licht.)- Great-billed Tern. 



These terns, with their conspicuous bright yellow feet and 

 bills, attracted our attention on March 25th at the entrance of 

 the San Juan, where a dozen were flying slowly about or perch- 

 ing on the mangrove snags left exposed by the tides. Occasion- 

 ally they rose upward and dived headlong after fish. We saw 

 none higher up. The large ungainly-looking bill reminded one 

 of the mandibles of their relation — the skimmer. 



Rhynchops nigra cinerascens Spix. Black-tailed Skimmer. 



A single bird, probably of this species, passed us March 

 25th, at the mouth of the San Juan, skimming as it flew. 



Larus atricilla Linn. Laughing Gull. 



A dead specimen of this bird was picked up on the water at 

 the mouth of the San Juan. Two other gulls, apparently of the 

 same species, were seen flying at a distance at the same place. 



Order GHARADRIIFORMES. 



Aegialitis semipalmatus (Bonap.). Semipalmated Plover. 

 Aegialitis collaris (Vieill.) . South American Collared Plover. 



Large flocks of plovers were wheeling about or running over 

 the mud flats at the mouth of the San Juan where we anchored 

 March 25th. They proved to be of these two species, semipal- 

 matus being in much greater numbers. None were seen farther 

 inland. 



Numenius hudsonicus Lath. Hudsonian Gurlew. 



The body of one of these birds in an advanced condition of 

 decay was found on the muddy shore of the Gano San Juan, 

 March 26th. The humerus had been broken and partly healed. 



Helodromas solitarius (Wilson). Solitary Sandpiper. 



April 9th two of these birds were seen in a pool of water 

 at the side of the narrow-gauge track leading from Guanoco to 



