194 LEONTOCEBUS 



GENUS LEONTOCEBUS. TAMARINS. 



T ?r? c — P — ^/T 2 ~ 2 — 



LEONTOCEBUS Wagn. Schreb., Saugth. Suppl., I, 1839, pp. 12, V 



bis. (248). Type Hapale chrysomelas Wied. 

 Midas Geoff., Ann. Mus. Hist. Nat. Paris, XIX, 1812, p. 120, (nee 



Latreille, Dipt., 1796). 

 Leontopithecus Less., Spec. Mamm., 1840, p. 268. 

 Marikina Reichenb., Vollstand. Naturg. Affen, 1862, p. 57, pi. II, 



figs. 25-31. 

 Tamarin Gray, Cat. Monkeys, Lemurs and Fruit-eating Bats, 



Brit. Mus., 1870, p. 68. 

 Tamarinus Trouess., Cat. Mamm. t. Viv. z. Foss., Quinz. Suppl., 



p. 29. 



"Cauda hand annulata, auriculis non penicillatus, facie juba longa 

 erectili circumcincta" (Wagner). 



Hair on head and neck long, forming a ruff; tail as long as the 

 body, tip bushy ; lower canine teeth longer than the incisors ; patch of 

 white hairs around the mouth, except in species of subgenus Marikina. 



KEY TO THE SPECIES. 



A. Tail black or mostly black, lips white. 

 a. Head black. 



a.' Head with median stripe. 



a." Stripe narrow, brown, greenish at 



occiput L. labiatus. 



' b." Stripe broad, red L. pileatus. 



b! Head without median stripe. 



a." Back dark grayish brown, legs black- 

 ish brown washed with gray L. thomasi. 



b." Back blackish chestnut speckled with 



red L. nigrifrons. 



c." Back black. 



a."' Legs bright reddish chestnut. . . .L. nigricollis. 

 b!" Legs rusty red L. chrysopygus. 



