lyo ALLEN'S NATURALISTS LIBRARY. 



I was seen, away they ran helter-skelter in all directions, and I 

 could only now and then catch a glimpse of the httle fellows 

 scuttling through the bushes. Of course they are entirely a 

 forest bird, though they may be seen just at the outskirts of 

 a wood." 



XII. Treacher's tree-partridge, arboricola 



HYPERYTHRA. 



Bambusicola hyperythra^ Sharpe, Ibis, 1879, p. 266 ; Gould, B. 



Asia, vi. pi. 71 (1879). 

 Arboricola hyperythra, Ogilvie-Grant, Cat. B. Brit. Mus. xxii. 



p. 217 (1893). 



Adult. — Differs from A. brmineipectus'vc\ having the crown jet 

 black; the broad eyebrow-stripes, ear-coverts, and cheeks ashy- 

 grey ; and the chin, throat, and under-parts reddish-chestnut. 

 The flank-feathers have the same peculiar black and white 

 marking as in the last species. Total length, io'5 inches; 

 wing, 5*2; tail, 2*2 ; tarsus, i-6. 



Range. — North-west Borneo; mountains above the Lawas 

 River. 



Since the present species was described in 1879 by Dr. 

 Bowdler Sharpe, from a single specimen obtained by Mr. 

 Treacher in the above locality, no more examples have been 

 obtained, and the type in the Oxford Museum remains unique. 

 It is just possible that a larger series of specimens than we have 

 at present had the opportunity of examining, may show that this 

 species and the following {A. erythrophrys) are stages of plu- 

 mage of the same bird {see Sharpe, Ibis, 1894, p. 539), but we 

 do not believe this to be the case, for in none of the specimens 

 of the latter species that we have examined — and we have had 

 a good series before us— is the grey eyebrow-stripe (apparently 

 a sign of immaturity) at all marked, and it is never found in 

 adult specimens with the crown black. 



