LASIOPYGA 321 



of nasals, 18.7 ; width of hraincase, 58.2 ; palatal length, 37.8 ; length 

 of upper molar series, 25.8; length of upper canines, 19.2; length of 

 mandible, 82.3 ; length of lower molar series, 33.2. 



Lasiopyqa cephodes (Pocock). 



Cercopithecus cephodes Pocock, Proc. Zool. Soc. Lond., 1907, p. 

 724. 



Type locality. Gaboon. Type in British Museum. 



Genl. Char. Basal portion of tail above like body, beneath gray- 

 ish ; hairs on ears yellowish. 



Color. Resembles L. cephus in general style of coloration, but 

 differs in having the entire upper part of head black, speckled with 

 yellow, and the ears covered heavily with yellowish white hairs ; the 

 hairs on upper part of cheeks paler, a uniform straw color; the 

 speckling on upper parts paler and lighter, more of an orange shade; 

 forearms with but little speckling above, and tail entirely different, 

 being like back above at base, and gradually merging into brownish 

 black at tip speckled with golden red, beneath gray on basal portion 

 merging into a darkish cinnamon ; nose white, the color extending up- 

 ward to between the eyes; hands and feet black. Ex type British 

 Museum. 



Measurements. Total length, 1,110; tail, 640; foot, 120. Skull: 

 total length, 90.5 ; occipito-nasal length, 77.5 ; intertemporal width, 

 40.2; Hensel, 56.5; zygomatic width, 59.1; width of braincase, 52.2; 

 median length of nasals, 16.1; palatal length, 31.6; length of upper 

 molar series, 23.1; length of upper canines, 15.6; length of mandible, 

 62.2 ; length of lower molar series, 29.2. Ex type British Museum. 



While resembling L. cephus in the general tone of the upper parts, 

 this style can be readily distinguished by its black head and totally 

 differently colored tail. The upper parts are brighter, more orange 

 hued, and the yellowish white hair on the ears is very conspicuous, as 

 is also the yellow hair on the cheeks. The status of this Monkey, 

 however, as a form distinct from L. cephus cannot as yet be regarded 

 as satisfactorily established. The majority of specimens with tails 

 colored like the type are thus far females, and cephus may be as 

 regards this member, dimorphic, at least in a restricted form, for 

 while females mostly possess such tails, some adult males also have 

 them. More specimens are required to show whether this peculiar 

 coloration is restricted to a certain locality, or obtained generally 

 wherever cephus is found, in which case it would simply be dimorphic. 



