150 LEMUR 



culties in the synonymy of the present species. The descriptions are 

 often meagre and insufficient, and the types no longer existing there was 

 little left to assist a correct decision to be reached. Some types remain 

 such as L. xanthomystax Gray, and L. melanocephalus Gray, both of 

 which are undoubtedly the same as L. fulvus. These are both in the 

 British Museum and may be described as follows : 



L. xanthomystax Gray, (1. c). Head and back of neck black; 

 black line between eyes ; nose black ; dark buff spot tinged with rufous 

 over each eye ; large bright rufous spot on each side of throat ; fur of 

 body and limbs rufous gray, hairs black tipped ; dorsal line dark reddish 

 brown ; under part of body pale rufous ; hands and feet rufous ; basal 

 portion of tail dark brown, remainder blackish. Ex type in British 

 Museum. 



Measurements. Skull : occipito-nasal length, 90 ; Hensel, 77 ; inter- 

 temporal width, 31 ; zygomatic width, 54; median length of nasals, 22; 

 length of upper molar series, 30; length of mandible, 62; length of 

 lower molar series, 27. 



L. melanocephalus Gray, (1. c). Top of head with a narrow line 

 extending over the ears to the occiput ; forehead, face and nose black ; 

 upper part of body grizzled chestnut and black ; outside of arms iron 

 gray ; outer side of legs brownish gray, chin and throat pale yellowish ; 

 outer side of limbs, and body beneath buffy ; hands dark brown ; feet 

 bright rufous; tail chestnut with black tips to the hairs on basal half, 

 but nearly all black on apical half. Ex type British Museum. 



It will thus be seen from the above descriptions that while the 

 general resemblance is the same, yet there are various differences in 

 coloration sufficient to mislead unless the species' tendency to exhibit 

 individual variations was not known nor understood. The black nose 

 will, however, always distinguish L. fulvus from L. mongos, as well as 

 its larger size, but neither of these characters are sufficient to separate 

 it from the next species with which it is more closely allied, at least 

 so far as coloration is concerned. 



Lemur rufifrons (Bennett). 



Lemur mongos Schreb., Saugth., I, 1775, p. 138, Taf. XXXIX A, 



(nee Linn.). 

 Lemur rufifrons Bennett, Proc. Zool. Soc. Lond., 1833, p. 106 ; 



Wagn., Schreb., Saugth. Suppl., I, 1840, p. 269; V, 1855, p. 



145 ; van d. Hoev., Tijdsch. Naturw. Geschied., XI, 1844. p. 



38 ; Fitzing., Sitzungsb. Metth. Naturw. Akad. Wiss. Wien, 



1870, p. 63 ; Bartl., Proc. Zool. Soc. Lond., 1879, p. 768. 



