_Charadrius mongolus stegmanni_ Stresemann, Ornith. Monatsb., 48,
1940, p. 55. New name for _Charadrius mongolus littoralis_
Stegmann, 1937, preoccupied. (Type locality, Behring Island.)
_Charadrius sanguineus_ Lesson, Man. d'Ornith., 2, 1828, p. 330 (No
type locality = Mariana Islands, _ex_ Oustalet, Nouv. Arch. Mus.
Hist. Nat. Paris, (3), 8, 1896, p. 48); _idem_, Traité d'Ornith.,
1831, p. 544 (no locality = Mariana Islands); Hartlaub, Journ. f.
Ornith., 1854, p. 167 (Mariannen).
_Charadrius mongolicus_ Oustalet, Nouv. Arch. Mus. Hist. Nat.
Paris, (3), 8, 1896, p. 48 (Guam, Jaluit, Palaos, Carolines);
Hartert, Novit. Zool., 5, 1898, p. 66 (Guam); Seale, Occ. Papers
Bernice P. Bishop Mus., 1, 1901, p. 36 (Guam); Safford, Osprey,
1902, p. 68 (Guam).
_Aegialitis mongolus_ Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk).
_Aegialis mongola_ Safford, Contr. U. S. Nat. Herb., 9, 1905, p.
80 (Guam).
_Aegialites mongola_ Cox, Island of Guam, 1917, p. 22 (Guam).
_Ochthodromus mongolicus_ Takatsukasa and Kuroda, Tori, 1, 1915,
p. 62 (Marianas, Ruk).
_Charadrius mongolus_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8,
1919, p. 132 (Ruk); Mayr, Birds Southwest Pacific, 1945, p. 38
(Micronesia).
_Charadrius mongolus mongolus_ Hartert, Vögel pal. Fauna, 11-12,
1920, p. 1543 (Marianen, Karolinen); Hand-list Japanese Birds,
rev., 1932, p. 194 (Guam, Truk, Iuripik, Kusaie, Jaluit, Majuro);
Peters, Check-list Birds World, 2, 1934, p. 253 (Carolines,
Marianas); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam);
Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 50 (Guam,
Peleliu, Ulithi).
_Cirrepidesmus mongolus mongolus_ Kuroda, in Momiyama, Birds
Micronesia, 1922, p. 44 (Guam, Ruk).
_Charadrius mongolus stegmanni_ Hand-list Japanese Birds, 3d ed.,
1942, p. 217 (Guam, Peliliu, Truk, Iuripik, Kusaie, Jaluit,
Majuro).
_Geographic range._--Breeds in northeastern Siberia and Bering Sea
area. Winters south to eastern Malaysia, Melanesia, and Australia.
In Micronesia: Mariana Islands--Guam; Palau Islands--Angaur,
Peleliu; Caroline Islands--Ulithi, Truk, Iuripik, Kusaie; Marshall
Islands--Jaluit, Majuro.
_Specimens examined._--Total number, 10 (4 males, 5 females, 1
unsexed), as follows: Mariana Islands, USNM--Guam, 2 (June 7, Sept.
1); AMNH--Guam, 3 (Aug. 15, 18, Nov. 30); Palau Islands,
USNM--Peleliu, 3 (Sept. 7-12); Caroline Islands, USNM--Ulithi, 1
(Aug. 22); AMNH--Truk, 1 (Feb. 8).
_Remarks._--According to Oustalet (1896:48), Lesson used two specimens
of this species, which were collected in the Marianas by the expedition
in the "Uranie," as types for his _Charadrius sanguineus_.
The Mongolian Dotterel is a regular visitor to western Micronesia. It is
recorded also from the Marshall Islands, which it probably reaches from
the westward by way of the Carolines, since the species has not been
recorded in the Hawaiian Islands.
A bird taken by the writer at Guam on June 7, 1945, was in winter
plumage and probably nonmigratory. The species was recorded also at Guam
in September. At Peleliu in September, 1945, the Mongolian Dotterel was
seen frequently on tidal flats by the NAMRU2 party. On September 8 there
was a flock of approximately fifty birds, in company with _Charadrius
leschenaultii_, at Akarakoro Point. In August at Ulithi, birds were on
the beaches in company with _Crocethia alba_. At Angaur on September 21,
1945, the species was with other shore birds in small groups at fresh
water ponds.
I am tentatively referring all specimens examined to _C. m. stegmanni_
although at this writing (1948) I am inclined to the opinion that a
critical reexamination of the referred specimens might reveal one or a
few individuals of the subspecies _C. m. mongolus_ Pallas.
=Charadrius leschenaultii= Lesson