MACACUS. 13 



period of gestation is about seven months, only a single young one, 

 as a rule, being produced at a birth. They become adult at the age 

 of 4 or 5 years, but breed earlier. 



Synopsis of Indian, Ceylonese, and Burmese Species. 



A. Tail less than f of head and body together. 



. Colour black, a grey beard and ruff round 



face M. silentts, p. 16. 



b. Colour brown, no beard or ruff. 



a'. Tail about half as long as the head and 



body, 

 a". Hair straight, buttocks naked around 



callosities M. rhesus, p. 13. 



b". Hair wavy or woolly, buttocks clad 



up to edge of callosities M.^issamensis, p. 15. 



b'. Tail about ^ as long as the head and 



body, and very slender. 

 a". A distinct horseshoe-shaped crest on 



the crown M. koninus, p. 18. 



b". No distinct crest M. nemestrinws, p. 20. 



c'. Tail very sbort, only one or two inches in 



length M. arctoides, p. 17. 



B. Tail more than f of head and body together. 



a. Hair of crown lengthened and distinctly 



radiating from middle. 

 '. General colour, greyish brown, not 



rufous M. sinicus, p. 23. 



b'. General colour rufous or yellowish .... M. pUeatus, p. 24. 



b. Hair of crown neither lengthened nor dis- 



tinctly radiating M. cynomolgus, p. 21. 



3. Macacus rhesus. The Bengal Monkey. 



Simia rhesus, Audebert, Hist, Nat. Singes, 2* fam. p. 5, pi. i (1797). 

 Simia erythrjea, Schreber, teste Shaw, Gen. Zool i, p. 33 (1800). 

 Macacus (Pithex) oinops, Hodgs. J. A, S. B. 1840, ix, p. 1212. 

 Inuus rhesus, Blyth, Cat. p. 8 ; Jerdon, Mam. p. 11. 

 Macacus rhesus, Anderson, An. Zool. Res. p. 55 ; id. Cat. p. 67. 



Bandar, H. ; Markat, Beng. ; Wdndar, Puriz, Punj, or Ponj, Kashmir ; 

 Gye, Ho Kol. 



Fur of moderate length (rather long in Himalayan specimens) 

 and straight, not wavy or woolly. Hair of crown not radiating 

 from centre. Tail two fifths to one half the length of the head 

 and body, tapering, not tufted at the end. Caudal vertebrae 

 usually 17 or 18. Ears naked. Buttocks naked for some distance 

 around the callosities. 



Colour. General colour hair-brown with a greyish tinge, the 

 hinder quarters being generally rufous or yellowish, especially in 

 adults. The hair is ashy towards the base, and more or less annu- 

 lated and tipped with light brown throughout the upper parts, giving 

 a minutely speckled appearance. Lower parts scarcely paler. 



