70 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
HOPLOXYPTERUS CAYANUS (Latham). 
CAYENNE PLOVER. 
Adults (sexes alike).—Forehead, 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 subterminally ; 
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).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 C4ura; 
Rio Mato; Ciudéd Bolivar and Ecuadér (Babahoyo and Guayaquil, 
Pacific side; Rio Napo and Sarayacu, Atlantic side), through Peru 
(lower Rio Ucayali; Rio Huallaga; Pebas; Santa Cruz; Santa Ana), 
British Guiana (Roraima; Ourumi), Cayenne, Bolivia (Rio Surutt, 
Province Del Sara) and Brazil (numerous localities) to Paraguay 
(upper Rio Parana); Falkland Islands; Honduras (Aloor, Rio Ulua). 
[Charadrius] cayanus Lataam, Index Orn., ii, 1790, 749 (Cayenne; based on 
Le Pluvier armé de Cayenne Buffon, Hist. Nat. Ois., viii, 102; Pl. Enl., 833; 
Spurwinged Plover Latham, Synopsis Birds, v. 215). 
a Hight specimens. b Seven specimens. 
Locality. Wing. | Tail. = Tarsus. made 
MALES. 
One adult male from Venezuela. ......-.--222--.22eeee ee eee eee 137.5 55 23 45 18 
Four adult males from Brazil........22.2200000ceeeeeeeeee seers 145.2} 65.4] 23.9] 43.5 18.9 
Three adult males from Bolivia....--....--...---.+2+.---222++ 142.7 62 23.8 45.8 20.2 
FEMALES. 
Two adult females from Venezuela........-...------+++e-- eee 142 61.7 24 43.7 19.5 
Five adult females from Brazil........... iG dame Me eaiceuseniaeece 141.2 61. 23, 4 44,3 19.6 
