488 Mr. R. Swinhoe^s Ornithological Notes made at Chefoo. 
these last was sent from Lake Baikal. It is odd that these 
two allied species should meet to winter in the Moluccas. 
I extract from my notes on the fresh bird :— ie The fat that 
abounds on the rump of birds in migration had in these 
nearly disappeared. The testes of the males were whitish 
and much swollen. The female was somewhat smaller than 
the males, was less smoked on the underparts, and had a 
lighter bill. 
£. Rim round eye yellowish. Bill on upper mandible 
blackish brown, with yellowish edge ; inside of mouth, rictus, 
and basal half of lower mandible chrome-yellow, the last 
brownish towards tip. Legs, toes, and nails light flesh-brown, 
darker on the toes. 
“ Length 7*1 inches. Wing 3*25, *85 longer than tertiaries, 
1*96 short of tail; first quill diminutive, second *1 shorter 
than the third and longest. Tail 3 inches, of twelve much 
graduated pointed feathers, outer one shorter than centrals. 
Under tail-coverts 1*08 short of tail-tip. Tarse 1*1; middle 
toe and claw L06; hind toe and claw *68. Bill in front *65, 
from gape *95.” 
22. Mock Nightingale. Arundinax canturiens , Swinh. 
Mr. Campbell brought me a specimen of this on the 15th 
October. It was the only one I saw at Chefoo. On the 29th 
October I got a male at Shanghai. I would call it a vagrant 
rather than a migrant species. I will resort to Blythes generic 
name for this group, as I find his type, A. olivaceus (= Turdus 
aedon , Pall.) (c/. P. Z. S. 1871, p. 353) is as much a bush- 
lover as any of ours, and not a reed-skulker. His genus has 
priority, though the name is any thing but apt. 
23. DaviiTs Small Mock Nightingale. Arundinax da - 
vidianus, J. Verr. 
In my “ Revised Catalogue 33 (P. Z. S. 1871), under Her- 
bivocula flemingi , I allude to this species as one of two sizes in 
the Paris Museum from Pekin. Mons. J. Yerreaux described 
it under the above name with Pere David^s novelties from 
Moupin (Chinese Thibet, to the north-west), (Nouv. Arch, du 
Museum, t. vi. (1870), p. 37. no. 18). I cannot understand 
