15 Mr. H. Seebohm on the Ornithology of Siberia. 
general colour of the underparts. This was buffish white in 
the adult birds, and buffish yellow in the young, precisely 
the difference which I had found only a few weeks before 
between the adult and young of the very closely allied L. 
certhiola. None of Middendorff’s birds, however, were the 
true L. certhiola of Pallas. The name L. ochotensis, Midd., 
therefore stands for this species, with L. certhiola, Pall. apud 
Midd., as asynonym. Besides Middendorff’s type I found a 
fine series of skins of this bird collected by Wosnessensky in 
Kamtchatka and the Kurile Islands. This bird differs from 
L. certhiola in having the upper parts plain, like L. luscini- 
cides, instead of spotted, like. L. nevia. Young birds have, 
however, traces of obscure spots on the head and back. In 
this state it was described by Cassin as L. japonica from Japan. 
The young in first winter plumage was described by Swinhoe 
as Arundinax blakistoni, from the same locality. One of 
Wosnessensky’s skins from Kamtchatka came into Swinhoe’s 
possession, and was described by him as L. subcerthiola. It 
is that of an adult bird, and agrees exactly with a skin in my 
collection collected by Wosnessensky on Urup island, one of 
the Kurile Islands, between Kamtchatka and Japan. In the 
British Museum is a skin from Labuan, in Borneo, where this 
species winters. 
LocusTELLA FASCIOLATA (Gray). 
Acrocephalus fasciolatus, Gray, P. Z. S. 1860, p. 349. 
Acrocephalus insularis, Wallace, Ibis, 1862, p. 350. 
Calamoherpe fumigata, Swinhoe, P. Z. S. 1863, pp. 91, 293. 
Calamoherpe subflavescens, Elliot, P. Z. 8. 1870, p. 243. 
It may at first sight appear a somewhat bold step to take 
to unite two species hitherto considered so distinct as A. fas- 
ciolatus and A. insularis, and a still bolder one, after having 
married the two species, to send them to spend their honey- 
moon in the genus Locustella. The fact is that they agree 
in every particular, except in the colour of the underparts. 
The difference of colour, however, is exactly what we have 
just found to be the difference between young and adult plu- 
mage in two species of the genus Locustella. I have already 
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