132 BIRDS FROM PERAK. 
There is a slight difference between the birds of Pérak and 
typical /. tzckel/z from Tenasserim. The Pérak birds are rather 
darker, more ashy below, and decidedly more dingy olive on 
the flanks. These dull colours may, however, be due in great 
part to worn nesting-plumage, of which Mr. WrRay’s speci- 
mens bear evidence. 
Trochalopterum peninsulz, sp. n. (Plate xxxvii.) 
‘No. 25. 6 2. Irides brown. Usually seen in the under- 
growth, but sometimes on the higher trees. One pair that I 
shot on a fair sized tree had been feeding on some large green 
seeds. There were also partly digested remains of insects in 
both of their stomachs. This bird has a pretty clear song, 
and roosts low down in the under-growth.”’ 
This species finds its nearest ally in 7. melanostigma of 
Tenasserim, resembling that speceies in the black wing-spot 
formed by the primary-coverts, but it differs in many import- 
ant points, which may be summarized as follows :— 
1. <A darker chestnut crown. 
2. The back chestnut-brown instead of ashy. 
g. Ear-coverts dingy rufous brown, not ashy. 
4 Breast chestnut-brown instead of ashy. 
The following is a description of the sexes of 7. penin- 
sulz :— 
Adult male. General colour above reddish brown, a trifle 
more olivaceous towards the lower back and rump; scapulars 
like the back; lesser and median coverts like the back, the 
latter slightly washed with rufous, greater coverts maroon-red; 
bastard-wing black, externally golden or maroon, the outer 
feather olive, greenish externally; primary coverts black, 
forming a large patch; quills blackish, externally olive-yellow 
with a golden lustre, rather brighter on the primaries; inner 
secondaries inclining to ashy grey towards the ends, which 
are edged with black; upper tail-coverts like the back ; tail- 
feathers dusky, externally golden olive ; crown of head deep 
chestnut as far as the occiput; nape and hind neck like the 
back, the former slightly tinged with rufous; lores and feathers 
over the eye black; sides of hinder crown dark ashy, forming a 
patch converging on the nape; sides of face, ear-coverts and 
cheeks dark rufous brown, blackish below the eye and on the 
