9. PIXHECIA. 69 



Pithecia, Desm. Brachyurus, Spix. Yarkea, Lesson, 

 See Monog., Gray, Proc. Zool. Soc. 1860, p. 228; andAnat., Flower, 

 P. Z. S. 1802, p. 326. 



I. Forehead and crown with a central black streak ; hair one-co- 

 loured. Pithecia. No. 1. 



II. Forehead and crown covered with hair, without any central 

 streak. Yarkea. 



a. Hairs white-tipped. Nos. 2, 3. 



b. Hairs with a subterminal ring. No. 4. 



* ITau- one-coloured. Pithecia. 



1. Pithecia leucocephala. The Black Tarkee. 



Forehead with a contral^black streak, of Hi«?e (?) yellow, offemah(?) 

 white. 



5 Sunia leucocephala, Aialeh. Sing. vii. f. 2. Pithecia leucocephala, 

 Geoff. ; Gray, Zool. Sulphur, p. l2, t. 2 (head) ! Simla pithecia, 

 Schreh. t. 32. Pithecia ochrocephala, Kuhl, Beifr. p. 46. c? P- 

 chrysocephala, /. Geoff. Cat. Manim. p. 53 ; ArcJiiv. du Mm. v. 

 p. 587, t. 29 ; Gray, P. Z. S, 1860, p. 230 ! P. iuusta, Spix, Bras. 

 p. 15, t. 13 ? Saki, Buffon, H. N. xv. t. 12. 



Uah. BrazU. 



The forehead is yellow when fresh, and white when faded by ex- 

 posure. M. Geolfroy thinks the colour depends on the size of the 

 specimen. 



•* Hair harsh, white tipped. 



2. Pithecia monachus. The Tarkee. B. M. 



Black, grey-washed ; hairs very long, harsh, white-tipped ; fore- 

 head and crown of male yellow, oi female white. 



Yarque, Buffon, Suppl.xn. t. 30 (bad). Simla monachus, Humh. Pi- 

 thecia monachus, Geoff. Ann. du Mus. xix. ; Gray, P. Z. S. 1860, 

 p. 230 ; Floiver, P. Z. S. 1862, t. 37 ! Is. Geoff. ; Castelnau, Exped. 

 Amer. Sud, t. 3. P. hir.suta, Sjnx, Bras. t. P. quapa, Poe^ypig. 

 P. noctuma, var., Lesson. P. irrorata. Gray, Zool. Sulph. p. 14, 

 t. 3 (forehead bald) ! Ann. ^- 3Iay. N. H. 1842, x. p. 256 ! 



Hab. Brazil. 



The specimen described by M. Geoffrey was young and in a very 

 bad state ; the one in the British Museum, figured in the ■ Voyage of 

 the Sulphur,' t., has the face quite bald. This is now shown to be 

 accidental, as the others, more lately received, have white hairs on 

 the face. 



3. Pithecia albicans. The Whitish Tarkee. B. il. 



Yellowish white ; tail and large patch on the back black, slightly 

 washed with white : hairs with short white tips. Male, female, and 

 young alike. 



