70 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



HOPLOXYPTERUS CAY ANUS (Latham). 



CAYENNE PLOVER. 



Adults (sexes alike). — Foreliead, anterior portion of crown (as far 

 back as middle of eye), loral, superciliary, suborbital, and auricular 

 regions, together with hindneck and a broad band across chest, 

 uniform deep black; margin of pileum, all round (usually broadly), 

 malar region, chin, throat, foreneck, under parts of body posterior 

 to chest, under and upper tail-coverts, axillars and under wing- 

 coverts immaculate white; central portion of pileum (occiput and 

 posterior part of crown) deep brownish gray (hair brown) ; inter- 

 scapulars deep brownish gray (hair brown), the outermost with 

 outer webs mostly white, forming a broad stripe along each side of 

 back; scapulars deep black, their concealed bases white; wing- 

 coverts and tertials light brownish gray (between drab-gray and 

 pale mouse gray), the greater coverts, together with secondaries, 

 white, the distal secondaries tipped with black; tail white broadly 

 tipped with black, the middle rectrices brownish gray sub terminally; 

 bill black, the base of mandible reddish; eyelids red-orange or scarlet 

 (in life) ; iris brown ; legs and feet red-orange, orange-red, or salmon- 

 red (in life). 



Adult male.— Wing, 135-150 (143.3); tail, 55-71 (62.8); culmen, 

 23-24.5 (23.7); tarsus, 42-45 (44.6); middle toe, 17.5-21.5 (19.2).° 



Adult female.— Wing, 132-149 (141.4); tail, 59-64 (61.2); culmen, 

 22-24 (23.6); tarsus, 42-45.5 (43.3); middle toe, 19-20 (19.6).^ 



South America, from Venezuela (San Felix; Maripa, Rio Caura; 

 Rio Mato; Ciudad Bolivar and Ecuador (Babahoyo and Guayaquil, 

 Pacific side; Rio Napo and Sarayacu, Atlantic side), through Peru 

 (lower Rio Ucayali; Rio liuallaga; Pebas; Santa Cruz; Santa Ana), 

 British Guiana (Roraima; Ourumi), Cayenne, Bolivia (Rio Surutu, 

 Province Del Sara) and Brazil (numerous localities) to Paraguay- 

 (upper Rio Parana); Falkland Islands; Honduras (Aloor, Piio Ulua). 



[ChararJrius] cayanus Latham, Index Orn., ii, 1790, 749 (Cayenne; based on 

 Le Pluvier arme de Cayenne Buffon, Hist. Nat. Ois., viii, 102; PI. Enl., 8S0; 

 Spurwinged Plover Latham, Synopsis Birds, v. 215). 



