_Conopoderas yamashinae_ Takatsukasa, Dobutsu. Zasshi, 43, 1931, p.
485. (Type locality, Pagan.)
_Tatare syrinx_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat.
Paris, (3), 7, 1895, p. 210 (Pagan).
_Acrocephalus syrinx_ Hartert (part), Novit. Zool., 5, 1898, p. 58
(Pagan); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1,
1901, p. 53 (Pagan).
_Acrocephalus stentoreus syrinx_ Kuroda (part), in Momiyama, Birds
Micronesia, 1922, p. 67 (Pagan).
_Conopoderas yamashinae_, Hand-list Japanese Birds, rev., 1932, p.
177 (Pagan).
_Conopoderas luscinia yamashinae_ Hand-list Japanese Birds, 3d
ed., 1942, p. 196 (Pagan).
_Acrocephalus luscinia yamashinae_ Mayr, Birds Southwest Pacific,
1945, p. 294 (Pagan).
_Geographic range._--Micronesia: Mariana Islands--Pagan.
_Characters._--Resembles _A. l. syrinx_, but duller and more
brownish and less olive-rufous on back, rump and tail; bill
shorter and more curved.
Takatsukasa (1931:485) gives the following description:
"Upperparts dark olive brown, paler on the lower rump; remiges and
rectrices dark olive-brown, margined with brown. Superciliary
stripe distinct and buff; chin, throat, breast and abdomen pale
brown; ear-coverts, sides of neck, sides of breast and flanks
dusty greyish brown, belly and under tail-coverts pale buff. Bill
clove brown, legs grey, and iris Van Dyke brown." He continues,
"It differs from _Conopoderas syrinx_ of Caroline Islands by its
colouration and the shape of the bill, namely in the new form the
culmen is more curved and more stout, and the tail is less
roundish and nearly square."
_Measurements._--Takatsukasa and Yamashina (1931b:485) lists the
following measurements: 13 adult males--wing, 75-80; tail, 65-70;
culmen, 20-22; 6 adult females--wing, 73-77; tail, 60-65; culmen,
20-22.
Mayr examined seven specimens from Pagan in the Paris Museum. His
measurements are: five males--wing, 76-79; tail, 66-69; bill from
nostril, 14-14.5; two females--wing, 75, 77; tail, 66, 67; bill
from nostril, 14.5, 15.
_Remarks._--No specimens have been examined by me. Oustalet (1895:210)
was the first to note the difference between the reed-warblers from
Pagan and those from Guam and Saipan (_A. l. luscinia_). He regarded
those from Pagan as similar to the population in the Carolines, calling
them _Tatare syrinx_. Hartert, Seale, and Momiyama followed Oustalet in
this regard, and it was not until 1931 that the population at Pagan was
recognized as distinct, when further collections were made by the
Japanese.
=Acrocephalus luscinia nijoi= (Yamashina)