344 MR. C. BODEN KLOSS ON 
This male differs from the females whose appearance I have 
recorded under M. andamanensis (1. ¢. 8.) in having the top of the 
head, median line of back and the extremities darker; limbs greyer 
throat chest and buttocks whiter; abdomen coarsely but indistinctly 
annulated ; and size much greater. 
It is fully adult with the teeth begining to show signs of 
wear and is a trifle larger than the type of M. x. adusta—the hind 
foot notably so; it is also, judgimg by the approximation of the 
muscular ridges on the parietals (18 mm.) a little older, but the form 
of the skull and its measurements and characters are in markedly 
close agreement. In connection with it I have examined a series 
of pig-tailed macaques (males) from the Malay Peninsula; all those 
from the Malay States, ie., the South, are either Macaca nemestrina 
(typical locality, Sumatra) or a slightly modified form; and are 
characterised by long muzzles, black crowns, and backs so blackened 
(though the spread of the latter colour is variable) that the black 
tail forms no contrast. Of two males from Trang, Peninsular Siam, 
however, one is a typical southern animal in every respect; the other 
approaches wdusta in colour as regards the reduction of the black 
element, though without the bright rufous suffusion; but its 
muzzle, though shorter than in wemestrina, is not modified to the 
same extent as in Tenasserim animals. Trang may therefore be 
regarded as the locality where intermediates between the two forms 
oceur, 
I have also been able to compare my specimen with a male 
example of M. andumanensis Bartlett. The latter is the type of 
M. leonina Blyth, and was at one time mounted and exhibited, and 
owing to exposure its colour is now much deteriorated: it is, how- 
ever, even more annulated than indochinensis, and the median line 
of the back was apparently not darkened or, if so, yet so slightly 
that annulations are clearly visible! ; otherwise the general ex- 
1. Anderson, however, (Zoolegical Researches in Yunnan, p. 52), 
says that “/eon/nus” has a dark median line on the lower half of the back 
and that above the tail there are no annulations: but these features are 
not mentioned in his descriptions of Blyth’s specimen (Cat. Mammals Indian 
Mas., I, p 71), and the later account in the “Researches” is perhaps drawn 
up from an Trawadi specimen showing gradation towards J, adusta. 
JOURN, NAT. HIST, SOC, SIAM, 
