Vom ON DEBI SPE CLES (OBR MINT VE ES 
(PERTCROCOTUS) OCCURRING IN 
TREES WAAAY PIP NUN SWIG 
By HERBERT C. RoBINnsoNn, C.M.Z.S., M.B.O.U. 
The species of the genus Pericrocotus or Flycatcher Shrikes 
are amongst the most brilliant and attractive of Oriental birds 
and much attention has, as a consequence, been paid to them 
both by systematists and collectors. Owing, however, to 
the fact that the characters relied on to separate the species 
are, In Many cases, variable within the species, the distinctions 
between certain of the allied forms are by no means so clear 
as might be desired, and a good deal of confusion exists as to 
the actual range and occurrences of several of the Malayan 
species. 
The F. M.S. Museums possess very large series of all 
the species from the Malay Peninsula, and in the present paper 
I have attempted to arrange these and the synonymy belonging 
them without in any way claiming any originality of treatment. 
OB INO) Wis0S SIs CjaS- 
A. Plumage with no red or yellow— _—~P. cinereus, p. 32. 
B. Plumage mainly red or yellow— 
a. The central tail feathers en- 
tirely black in the male: 
quill lining yellow baa | 12s URIS, jDn Bs 
b. The central tail feathers partly 
red in the male, quill lining 
red 
Ax. With no isolated red or yellow 
marks on the outer webs of the 
tertiaries re ... P. montanus, p. 33. 
Bi. With isolated red or yellow marks 
on the outer webs of the tertia- 
Ties 
a. Larger, wing as a rule exceed- 
inp, Osea... ... P. zanthogaster 
flammufer, p. 35. 
b. Smaller, wing less than 85 
mm. oie ... P.zanthogaster 
zanthogaster, p. 37. 
