OCHTHODROMUS. 107 
surface white, with a patch of brown on each side of upper breast. ‘Bill 
black; tarsus greenish gray or pale olive; toes dusky or blackish; iris 
brown.’ (Hwme.) 
“Young.—Similar to the adults in winter plumage, but dark brown, 
with faint edges of sandy buff to the feathers of upper surface; eyebrow 
and sides of face washed with sandy rufous, a strong shade of which color 
pervades chest and sides of upper breast.” (Sharpe.) 
In winter plumage Ochthodromus geoffroyi and O. mongolus are very 
similar but the former may be recognized by its larger size and longer 
bill. In a male the wing measures 136; tail, 57; exposed culmen, 24; 
tarsus, 36; middle toe with claw, 24. Wing of a female, 140; tail, 55; 
exposed culmen, 24; tarsus, 37; middle toe with claw, 23. 
93. OCHTHODROMUS MONGOLUS (Pallas). 
LESSER SAND PLOVER. 
Charadrius mongolus Patuas, Reise Russ. Reichs (1776), 3, 700. 
Ochthodromus mongolus SHARPE, Cat. Birds Brit. Mus. (1896), 24, 223; 
Hand-List (1899), 1, 153; McGregor and WorcrEstTerR, Hand-List 
(1906), 23. 
Aigialitis mongolica GRANT, Ibis (1896), 126. 
Basilan (McGregor) ; Batan (McGregor) ; Bohol (Everett) ; Cagayancillo (Mc- 
Gregor); Calayan (McGregor); Cebu (McGregor); Cuyo (McGregor); Leyte 
(Everett); Lubang (McGregor); Luzon (Whitehead, McGregor); Mindanao 
(Mearns) ; Mindoro (Porter) ; Negros (Bourns € Worcester) ; Palawan (Platen, 
Whitehead) ; Ticao (McGregor). Northern Asia, south in winter to China, Malay 
Archipelago, and Australia. 
“Adult in breeding plumage.—Similar to O. geoffroyi, but smaller, bill 
and tarsus much shorter; a broader black line along sides of face; ear- 
coverts entirely black; the white throat separated from the rufous chest- 
band by a narrowly indicated line of black. ‘Bill black; feet somewhat 
bluish black, toes darker; iris dark brown.’ (Stejneger.) Length, 190; 
culmen, 19; wing, 127; tail, 53; tarsus, 30. 
“Adult female in summer plumage.—Similar to the male, but less richly 
colored; rufous chest-band never so pronounced; facial markings less 
developed, the black bands on the forehead often obsolete. ‘Bill black; 
feet dark gray, with an olive tinge; toes darker, blackish; iris dark hazel.’ 
(Stejneger.) Length, 178; culmen, 20; wing, 140; tail, 47; tarsus, 30. 
“Adult in winter plumage.—Differs from the summer plumage in 
wanting the facial markings and the rufous chest. Very similar to the 
winter plumage of O. geoffroyi, and distinguished chiefly by its smaller 
size, shorter bill, and shorter tarsus; there is also a little more brown on 
the ear-coverts. 
“Young.—Similar to the adults in winter plumage, but darker brown, 
all the feathers edged with sandy brown; eyebrow, sides of face, and under 
surface of body with a strong tint of sandy buff. ‘Bill, angle of mouth, 
