LASIOPYGA. 177 



Color. Crown of head, neck above, entire upperparts of body, 

 forearms, legs and tail black; inner side of legs, and area on knees 

 grizzly; entire rest of head and body, and upper side of arms beyond 

 elbow cream color. Type in United States National Museum. 



Measurements. Total length, 830; tail, 400. Skull: Greatest 

 length, 94; zygomatic width, 64.2; Type in United States National 

 Museum. 



Family Lasiopygidae. 



Subfamily Lasiopyginae. 

 Genus Lasiopyga. 



Lasiopyga mona (Schreber). 



Simla mona Schreb., Saugth., I, 1775, p. 97, pi. xv. 



Cercopithecus mona Erxl., Syst. Reg. Anim., 1777, p. 30. 



Lasiopyga mona Hollister, Proc. Biol. Soc. Wash., XXV, 1912, p. 93; 

 Elliot, Rev. Primates, II, 1913, p. 350, pi. xxxv. 



Mona guenon Elliot, Rev. Primates, II, 1913, p. 350. 



Type locality. "Barbary." 



Geogr. Distr. Island of Grenada, West Indies (introduced); 

 St. Kitts (?); Jebba, River Niger; Bankana, southern Nigeria; Gold 

 Coast to Cameroon, West Africa. 



Color. Long, upright white hairs across forehead forming a band 

 extending upward on head; at its base a narrow line of black; top 

 of head speckled yellow and black, this coloring extending downward 

 on to hind neck; entire upperparts and sides of body speckled rusty 

 red and black, darkest on lower back; cheeks and sides of head, hairs 

 long, gray, ringed on apical portion with yellow and black; outer side 

 of arms and hands black; outer side of legs black, speckled with 

 minute red spots; feet black; chin, throat, entire underparts and inner 

 side of limbs grayish white; conspicuous patch beneath tail to hips 

 snow white; tail above, basal third speckled red and black, yellowish 

 gray beneath, remainder black; ear-tufts long, speckled with greenish 

 yellow. 



Measurements. Total length, 1.295; tail, 785; foot, 145. Skull: 

 Total length, 93.7; occipito-nasal length, 77.9; intertemporal width, 

 39.1; Hensel, 60.5; zygomatic width, 59.7; breadth of braincase, 52.7; 

 median length of nasals, 13.6; palatal length, 32.2; length of upper 

 molar series, 23.2; length of mandible, 59.2; length of lower molar 

 series, 30. 



