the Birds of the Island of Formosa. 169 
10. *Parus rvsperarus Swinh. 
Parus insperatus Swiuh. Ibis, 1866, p. 308; La Touche, 
op. cit. 1895, pp. 322, 332. 
Parus monticolus insperatus Hellmayr, Das Tierreich, 
Paride, p. 99 (1903). 
a—e. $ 2. Racu Racu Mts., 6000 ft., Jan., Feb. 1906. 
Tris dark brown; bill black ; feet bluish grey. 
This insular form appears to differ slightly but constantly 
from typical P. monticola in its rather smaller size, in having 
the grey of the rump slightly paler and extending rather 
further up the back, the outer webs of the quills and tail- 
feathers of a rather brighter blue, and the white on the inner 
secondaries confined to the tip and not extending along the 
margin of the outer web; the two last-named characters are 
sometimes found in continental birds from China &e. 
Males. Females. 
P. insperatus ...... Wing 2°55-2°65 2°50-2°6 
P. monticola ...... » 2° 65-2°8 2°55-2°8 
41. +Parus casTANEIVENTRIS Gould. 
Parus castaneoventris Gould, Ba: Se l862, p: 280: 
Parus castaneiventris Swinh. Ibis, 1863, p. 295. 
Parus varius castaneoventris Hellmayr, Das Tierreich, 
Paridee, p. 84 (1903). 
Swinhoe states that this handsome Titmouse is entirely 
restricted to the interior mountain-chains of Formosa, where 
it is said to be by no means common. 
42. *AGITHALUS CONCINNUS (Gould). 
Psaltria concinna Gould, B. Asia, ii. pl. 65 (1855) 
[China]. 
Lhigithalos concinnus Hellmayr, Das Tierreich, Parid, 
p- 122 (1903). 
a—d. 6 2. Racu.Racu Mts., 6000 ft., Jan. 1906. 
Iris cream-coloured. 
The examples of this elegant Long-tailed Titmouse col- 
lected by Mr. Goodfellow differ in nowise from specimens 
from China and Hainan. [It is the first time that this 
species has been recorded from Formosa. 
