Zosterops conspicillata Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 205 (Saypan); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Saipan); Finsch (part), Das Tierreich, no. 15, 1901, p. 37 (Saipan); Matschie (part), Journ. f. Ornith., 1901, pp. 112, 113 (Saipan); Prowazek, Die deutschen Marianen, 1913, p. 101 (Saipan); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Marianne = Saipan).
Zosterops conspicillata var. saypani Snouckaert, Alauda, (2), 3, 1931, p. 22 (Saypan).
Zosterops conspicillatus Kuroda (part), in Momiyama, Birds Micronesia, 1922; p. 76 (Saipan).
Zosterops saipani Mathews, Syst. Avium Australasianarum, 2, 1930, p. 706 (Saipan).
Zosterops conspicillata saipani Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Saipan); Hand-list Japanese Birds, rev., 1932, p. 173 (Saipan, Tinian); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Saipan, Tinian); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Tinian, Saipan); idem, Birds Southwest Pacific, 1945, p. 299 (Saipan, Tinian); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 104 (Tinian); Stott, Auk, 64, 1947, p. 527 (Saipan); Baker, Smithson, Misc. Coll., vol. 107, no. 15, 1948, p. 73 (Saipan, Tinian).
Zosterops conspicillatus saipani Yamashina, Tori, 7, 1932, p. 398 (Tinian).
Geographic range.—Micronesia: Mariana Islands—Tinian, Saipan.
Characters.—Adult: Resembles Z. c. conspicillata, but slightly smaller with fronto-loral band more greenish yellow; auriculars olivaceous; orbital ring narrower; upper parts brighter olive; underparts pale yellowish-white; bill darker. Birds from Saipan resemble closely birds from Tinian, but upper parts may be slightly brighter and underparts slightly more yellowish; iris chestnut.
Measurements.—Measurements are listed in [table 50]. Twenty-three birds from Tinian measure: wing, 51 (50-53); tail, 38 (35-41); full culmen, 12.0 (12.0-13.0); tarsus, 18 (17-18); six birds from Saipan measure: wing, 54 (52-55); tail, 37 (35-39); full culmen, 13.0 (13.0-15.0); tarsus, 18 (17-19). Birds from Saipan are slightly larger than birds from Tinian.
Specimens examined.—Total number, 33 (18 males, 13 females, 2 unsexed), as follows: Mariana Islands, USNM—7 (Oct. 7, 8, 9, 10, 23); AMNH—26 (July, Aug., Sept.).