figs BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Genus SQUATAROLA Cuvier. 
Squatarola Cuvier, Régné Animal, i, 1817, 467. (Type, by tautonymy, Tringa 
squatarola Linneus.) « 
Large Charadriide (wing 178-199 mm.) with a minute hallux, 
large, stout bill, and spotted upper parts, the under parts largely 
uniform black in summer adults. 
Bill shorter than head, very stout, its depth at gonydeal angle equal 
to more than one-fifth the length of exposed culmen, the broad nasal 
fossa occupying about basal half of maxilla, the distal half of culmen 
rather strongly convex, the gonys faintly convex, with basal angle 
prominent. Wing long and very pointed, the longest primary 
(outermost) exceeding distal secondaries by much more than half the 
length of wing and extending greatly beyond tips of longest ter- 
tials, Tail decidedly more than one-third as long as wing (nearly 
as long as from bend to tip of distal secondaries), truncate, but mid- 
dle pair of rectrices slightly longest. Tarsus nearly one-fourth as 
long as wing, slender, covered all round with small hexagonal scales, - 
these somewhat larger in front; middle toe, without claw, between half 
and two-thirds as long as tarsus, the lateral toes much shorter, the 
outer slightly longer than the inner one; hallux present but minute 
(almost vestigial), with claw stout and straight; a well-developed 
web between basal phalanges of outer and middle toes, and a distinct 
though much smaller one between inner and middle toes; bare 
portion of tibia shorter than middle toe or culmen. 
Coloration.—Adults spotted above with white and dusky, in sum- 
mer with forehead, sides of head, and posterior under parts immacu- 
late white, the remaining under parts uniform black. 
Range.—Circumpolar regions, south in winter to Brazil, Peru, 
South Africa, Australia, Philippines, etc. (Monotypic.) 
SQUATAROLA SQUATAROLA (Linnzus). 
BLACK-BELLIED PLOVER. 
Adults in breeding plumage (sexes alike).—Upper parts pale gray or 
grayish white, the forehead, superciliary region, and sides of neck 
nearly pure white and unspotted, the back, scapulars, and wing- 
coverts with irregular transverse spots of brownish black (this some- 
times predominating), the rump often with irregular transverse spots 
or bars of the same; primaries dusky, their shafts white for middle 
portion, the proximal quills frequently with a more or less distinct 
longitudinal mark or narrow stripe of white on outer webs; tail 
white, narrowly and irregularly barred with blackish; loral, subor- 
bital, auricular and malar regions, chin, throat, foreneck and under 
parts as far as lower abdomen, uniform black, with a faint bronzy or 
coppery gloss; lower abdomen, anal region, and under tail-coverts 
