A LOU ATT A 267 



Alouatta ululata Elliot. 



Alouatta ululata Elliot, Bull. Am. Mus. Nat. Hist, N. Y., 1912, p. 

 32. 



Alouatta discolor Dollm., (nee Spix), Ann. Mag. Nat. Hist., VI, 

 1910, 8th Ser., p. 422. 



Type locality. Miritibi, Maranhao. Type in British Museum. 



Geogr. Distr. Lower Amazon ; Maranhao, Brazil. 



Genl. Char. Sexes unlike; male with chestnut red back, female 

 raw umber. 



Color. Male. Forehead, and whiskers extending beneath chin, 

 black ; top of head brownish black ; arms, hands, feet, rump, and outer 

 side of legs black; indistinct blackish stripe on middle of back; rest 

 of upper parts and flanks rich chestnut red, in certain lights suffused 

 with a golden color ; upper edge of thighs chestnut red ; forearms 

 beneath, black ; rest of under parts and limbs beneath nude ; fingers and 

 toes covered with long yellowish red hairs ; tail black with numerous 

 golden red hairs intermingled; tip chestnut red like flanks. Ex type 

 in British Museum. 



Female. Tuft above middle of forehead, and whiskers black ; top 

 and sides of head above ears, upper part of body and flanks raw umber, 

 with a golden tinge on head, and an indistinct dark dorsal line ; arms 

 black with a strong olive tinge ; legs similar but paler ; hands similar to 

 arms, but hairs grading at knuckles, and extending over fingers, yellow- 

 ish gray ; feet more golden red, and toes golden yellow ; tail like legs 

 at base grading to a mixed golden red and black, with the tip golden 

 red. Body and limbs beneath, naked. Ex type in British Museum. 



Measurements. Male. Total length, 1,145; tail, 585; foot, 140. 

 (Skin). Skull : total length, 120.5 ; occipito-nasal length, 101.4 ; Hensel, 

 104.3 ; zygomatic width, 78.4; breadth of braincase, 52.4; palatal length, 

 47.7 ; median length of nasals, 25.5 ; length of upper molar series, 33.5 ; 

 length of mandible, 95.1 ; length of lower molar series, 40.5. Ex 

 specimen in British Museum. The above descriptions were taken from 

 specimens loaned to me by my friend Guy DoUman, Esq., of the British 

 Museum, and received from Miritibi, Maranhao, Brazil. 



Examples of this monkey were received at the British Museum 

 representing both sexes and were supposed by Mr. Dollman to be the 

 long lost Mycetes discolor Spix, and were so described by him under 

 that name (1. c). I have already remarked upon the dissimilarity 

 frequently existing between Spix's descriptions and his types, and also 



