LEONTOCEBUS 197 



between the example and specimens of L. labiatus, and is hardly 

 sufficient to be regarded as a distinctive character. Gray in his descrip- 

 tion (1. c.) states that this head spot was the same color as the under 

 parts, "chestnut brown." At present it is gray, as above stated, and 

 must have faded considerably. The under parts are now ochraceous 

 rufous, and this part, in the intervening sixty or more years, has un- 

 doubtedly faded from the more brilliant color of the living animal. It 

 would seem most probable that this example is not distinct from L. 

 labiatus. Slack's type of (M.) elegantulus is in the National Mu- 

 seum, Washington, in excellent preservation. The arms to elbows, 

 and legs to ankles, and upper parts of body are mottled black and buff, 

 not dark reddish brown or blackish as in the type of L. labiatus, but 

 this difference may be caused by age. The rest of the pelage is like 

 that of the type of L. labiatus. 



Midas griseoventris Goeldi, I have not seen, as there was no 

 example in any European Museum. Its chief character for separating 

 it from the present species appears to be the color of the patch or stripe 

 on the crown which is stated to be white. This certainly is not the 

 color of the patch or stripe on the crown of L. labiatus type. Gray's 

 ruAventer has now a gray patch on the crown although, as stated above, 

 it was described as chestnut brown. It may be there is a race of L. 

 labiatus with a gray or white crown patch, but in such a case it would 

 have to be determined whether Goeldi and Gray's examples represent 

 the same species, and if they do, Gray's name ruiiventer though a poor 

 one, would take precedence, and comparisons of specimens would be 

 necessary to decide this. For the present, therefore, I place Goeldi's 

 name among the synonyms of L. labiatus with a question mark. 



Leontocebus pileatus (I. Geoffroy). 



Midas pileatus I. Geoff, et Deville, Compt. Rend., XXVII, 1848, 

 p. 497; Id. Cat Primates, 1851, p. 62; Id. Archiv. Mus. Paris, 

 V, 1852, p. 569, pi. XXXI; Casteln., Exped. Amer. Sud, 

 Mamm., 1855, p. 21 ; Dahlb., Stud. Zool. Fam. Reg. Anim. 

 Nat., fasc. I, 1856, pp. 189, 194; Slack, Proc. Acad. Nat. 

 Scien, Phil., 1861, p. 464. 



Hapale pileata Wagn., Schreb., Saugth. Suppl., V, 1855, p. 130. 



BONNETED TAMARIN. 



Type locality. Near Pebas, Upper Amazon, Brazil. Type in 

 Paris Museum. 



Geogr. Distr. Upper Amazon, range unknown. 



