1896,] NATURAL SCIENCES OF PHILADELPHIA. 485 



The Occurrence of Macaciis leoninus (Blyth) in Eastern Bur- 

 mah. — Arthur Erwin Brown stated that a young male moukey 

 nearly allied to Maeacus nemestrinus was purchased by the Zoologi- 

 cal Society of Philadelphia iu April, 1894, from a person who had 

 procured it at Mongnai, in the southern Shan states, Upper Burmah. 

 At the time this animal was received, certain peculiarities led him to 

 refer it provisionally to M. leoyiimis (Blyth), but it is only lately 

 that he had fully determined this identification to be correct. It has 

 now lived in the garden two years and a half and he would suppose 

 it to be about four years old, but it has not yet assumed the full 

 colors of the male of this species as shown in Mr. Sclater's plate' 

 the resemblance between it and the female being still close. The 

 general color is pale brown, resulting from the yellow and brown 

 annulation of the hairs ; the sides of the body and outside of the limbs 

 are rather paler and somewhat grayish ; the horse-shoe mark on top 

 of the head is well defined in a darker shade of brown which shows 

 also along the back and upper side of the tail and slightly appears 

 on the back of the hands and feet. The characteristic red line in 

 the bare skin from the outer corner of the eye is well marked, and 

 it is interesting to observe that it becomes much brighter in color 

 when the animal is excited than at other times. It is doubtful if 

 this mark would be at all evident in skins. The specimen is now 

 about twenty inches in length from nose to base of tail ; the tail 

 being about six and a half and without a tuft. 



As compared with nemestrinus of like age leoninus has the muz- 

 zle shorter, the superciliary ridges more prominent, the ischial callos- 

 ities smaller, the hair about the cheeks, neck and shoulders much 

 longer, the spreading whiskers being conspicuous when looked at 

 from in front, the face and ears are paler and the iris is distinctly 

 hazel brown, while in nemestrinus it is of a paler yellowish-brown. 



It would appear that M. leoninushas heretofore been only known 

 to occur in the Province of Arracan, in Western Burmah, on the 

 Bay of Bengal, and from a few localities in the Valley of the Irra- 

 waddy, the present specimen, therefore, extends the range of the 

 species eastward across Upper Burmah to the borders of Yunnan. 

 Dr. Griggs, from whom the specimen was procured, fully assured 

 the speaker as to the locality. 



The characters of this monkey are very distinct and at its present 

 age, when placed side by side with specimens of the southern form 

 of pig-tailed monkey, M. nemestrinus, there is no possibility of con- 

 fusing them. 



October 27. 

 The President, Samuel G. Dixon, M. D., in the Chair. 

 Thirty-one persons present. 



1 Proc. Zool. Soc. of London, 1870, pi. XXXV. 



