110 TtTEMD^. 



upper mandible dark brown, under mandible pale horn-colour ; rictal 

 bristles obsolete. Wing rather long, flat, and pointed ; third 

 primary longest ; second primary sometimes slightly longer, some- 

 times slightly shorter than the fourth ; bastard primary rery small, 

 even in birds of the year shorter than the primary-coverts. Tail 

 shorter than the wing, outside feathers O'S to 1"0 inch shorter than 

 the longest, but slightly longer than the under tail-coverts. Legs, 

 feet, and claws pale brown. Length of wing 3'2 to 2"9 inches, 

 tail 3-0 to 2-6, culmen 0-8 to 0-7, tarsus I'lo to 1-05. 



In a female in my collection from Amoj-, and in another from 

 Hakodadi, the pale ash-grey on the chin, throat, and breast is re- 

 placed on the chin and upper throat by pale brownish white, shading 

 into brown on the lower throat, which becomes more ochraceous on 

 the breast. It is possible, however, that the fully adult female may 

 be found to be similar to the male. After the autumn moult the 

 ash-grey of the breast is less violet in colour. In birds of the year 

 the whole of the plumage is suffused with j-ellow, causing the 

 general colour of the upper parts to be more olive-brown than 

 russet -brown, and the chin, throat, and centre of belly to be huffish 

 yellow. In this plumage, which of course continues until tlie 

 spring moult, becoming diiUcr by the usual abrasion which takes 

 place during the winter, it is the A. fasciolatus of Gray and the 

 C. suhjlavescens of Elliot. 



Gray's Grasshopper Warbler breeds in South-eastern Siberia, 

 probalily throughout the valley of the Araoor from Lake Baical to 

 the Pacific and North Japan. It passes aloug the coast of China on 

 migration, and winters in the islands of the Malay archipelago 

 (Gilolo, Morty, Batchiau, &c.). 



a. (S juv. sk. Batchian. A. R. W^allaoe, Esq. [C.]. 



(Type oi Acrocephahis fasciolatus, Gray.) 



h, c. Juv. sk. Batchian. A. I!. Wallace, Esq. [C."]. 



<7. Ad. sk. Gilolo. A. R. Wallace, Esq. [C.]. 

 (Type of Acrocephahcs insidaris, Wallace.) 



e. Juv. sk. Mortv Is. A. R. Wallace, Esq. [C.l. 



/, f/. Ad. sk. Morty Is. A. R. Wallace, Esq. [C.l. 



h. Juv. sk. Kaioa Is. A. R. Wallace, Esq. [C.J. 



2. Locustella fluviatilis. 



Sylvia fluviatihs, Wolf, Taschenb. i. p. 229 (1810) ; Temtn. Man. 



d'Orn. i. p. 183 (1820) ; Naum. Vog. Deutschl. iii. p. 694 (182.3); 



Kordm. T>etmd. Voy. Buss. mend. iii. p. 141 (1840) ; Wernei; 



Atlas, Insectiv. pi. 25 (1842). 

 Acrocephalus stagnatilis, Naum. Nat. Land- u. Wass.-Vog. nordl. 



Deutschl., Nachtr. p. 202, pi. 26. figs. 2, 3 (1811). 

 Calamoherpe fluviatilis ( Wolf), Bole, Isis, 1822, p. 5.52. 

 Potamodus fluviatilis ( Wolf), Kauj), Naturl. Syst. p. 123 (1829). 

 Locustella fluviatilis {Wolf), Gould, B. Eur. il. pi. 102 (1837); Bp. 



Comp. List B. Eur. 8f N. Amer. p. 12 (1838) ; Dresser, B, Eur. 



pt. xxxiv. (1875). 

 Salicaria fluviatilis {Wolf), Keys. u. Bias. Wirb. Eur. p. 180 (1840); 



Schl. Bev. Crit. p. xxviii (1844). 



