232 CALLITHRIX 



Hapale albicollis I. Geoff., Cat. Primates, 1851, p. 59; Dahlb., Stud. 

 Zool. Fam. Reg. Natur., fasc. I, 1859, pp. 185, 187 ; Gray, Cat. 

 Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 1870, 

 p. 63, var. 3. 



Hapale albicollis var. C. Less., Spec. Mamm., 1840, p. 189. 



Type locality. Woods in vicinity of Bahia, Brazil. Type in 

 Munich Museum. 



Geogr. Distr. Vicinity of Bahia, Brazil. 



Genl. Char. Ears tufted; hairs on neck long forming a mantle; 

 size small. 



Color. Top of head reddish brown ; long ear tufts grayish white ; 

 sides and back of head and neck yellowish white ; upper parts mottled 

 with black and ochraceous, hairs tipped with white ; outer side of limbs 

 brownish black, hairs gray tipped; throat and fore part of breast 

 grayish white ; under parts, hands and feet blackish brown ; tail brown- 

 ish black, indistinctly ringed with gray. Ex type Munich Museum. 

 The throat and fore part of chest appear yellowish, but this is merely the 

 reflection of the skin, the hairs being grayish white. The skull is in 

 the specimen. 



Color. Ex specimen British Museum. Upper lip and spot on fore- 

 head white ; head in front of ears, Prout's brown ; center of head, and 

 nape yellowish white, sometimes grayish white ; ear tufts white ; back 

 very similar to that of C. leucocephala, the hairs ochraceous with 

 a subterminal black bar and white tips ; arms blackish brown, hairs 

 tipped with yellowish ; legs yellowish brown ; under parts pale brown 

 on throat and a band across chest and inner side of legs, rest blackish 

 brown ; tail ringed black and gray, or black and yellowish ; hands and 

 feet dark brown washed with gray. 



Measurements. Total length, 494 ; tail, 296 ; foot, 59 ; ear, 24, 

 (Collector). Skull: occipito-nasal length, 41; Hensel, 30; intertem- 

 poral width, 24; width of braincase, 24; zygomatic width, 30; palatal 

 length, 13.5 ; median length of nasals, 6 ; length of upper molar series, 

 8 ; length of mandible, 28 ; length of lower molar series, 10. 



The difference between this form and C. leucocephala is mainly 

 in the coloring of the nape and ear tufts, which are yellowish white in 

 C. albicollis and black in its relative ; the rest of the pelage is colored 

 almost exactly the same. 



Caxlithrix pygm^sa (Spix). 



Jacchus pygmaus Spix, Simiae et Vespert. Bras., 1823, p. 32, pi. 

 XXIV, fig. 2 ; Reichenb., Vollstand. Naturg. Affen, 1862, p. 1. 



