HF LOGATES 173 
Specimens of this Gibbon procured by me at Claudetown and now 
in the British Museum show that the coloring in different parts of 
the body must be considered of little importance, as I obtained eleven 
specimens, five of which were in the same troupe, and the other six 
from the same locality, varying in color as much as it was possible 
for them to do; some had yellowish backs and black chests, and some 
nearly black all over, whilst others were almost a complete silvery 
gray. I therefore came to the conclusion that Hylobates miilleri and 
Hylobates leuciscus cannot be separated. The peculiar bubbling noise 
they make is similar. I think it very unlikely that two distinct species 
should be so constantly found together as they are in Sarawak. 
“The natives call the silver gray variety Emplian or Wa Wa, and 
the dark one Emplian-arang (coal) because of its color. The noise 
made by these gibbons is very pretty, commencing punctually at five 
o'clock in the morning and continuing till the sun is above the tops 
of the trees. They become very tame and make very nice pets.” 
In regard to Mr. Hose’s decision that H. miilleri, (H. cONCOLOR 
of this work), and H. Leuciscus cannot be separated, it must be borne 
in mind that he is writing of the Bornean gray Gibbon that has been 
called leuciscus by some writers, and not Schreber’s LEuciscus from 
Java, to which Mr. Hose does not refer. He is undoubtedly correct 
in referring to one species all the Gibbons seen and obtained by him 
in Borneo, but the true LEUcIScus from Java has little resemblance 
to H. concotor, in fact none at all to the typical style, for the black 
and brown animal is not found in Java, and H. Leuciscus of that 
island has none of the variations so characteristic of the Bornean 
species. 
This Gibbon was described by Harlan, most probably from an 
immature female, whose peniform clitoris misled him into charac- 
terizing his example as an “hermaphrodite ourang outan.’”’ (!) The 
type was imported from Borneo into New York in 1826, and lived for 
some time, and at its death was considered to be less than two years old. 
The teeth had not all appeared as there was but the first molar on 
each side of both jaws the second and third not having come. Harlan 
says there were three molars, but the first and second of these must 
have been premolars. 
Trouessart in the Supplement to his Catalogus Mammalium, 1904- 
1905, in a footnote, states that concotor Harlan was applied to two 
different species of which the oldest was a young H. (symphalangus) 
syndactylus, and that the name concolor must be abandoned. In this, 
however, he is in error. Harlan never described any Hy tosatTes in 
