ALOUATTA 281 



white ( ?) hair, the whiskers and beard only being of a tawny hue. It 

 was kept in a house, together with a Coaita and a Cairara monkey 

 (Cebus albifrons). Both these lively members of the monkey order 

 seemed rather to court attention, but the Mycetes shrunk away when 

 any one approached. When it first arrived, it occasionally made a gruff, 

 subdued howling noise early in the morning. The deep volume of 

 sound in the voice of the howling monkeys, as is well known, is pro- 

 duced by a drum-shaped expansion in the larynx. It was curious to 

 watch the animal while venting its hollow cavernous roar, and observe 

 how small was the muscular exertion employed. When howlers are 

 seen in the forest there are generally three or four of them mounted on 

 the topmost branches of a tree. It does not appear that their harrow- 

 ing roar is emitted from sudden alarm ; at least, it was not so in captive 

 individuals. It is probable, however, that the noise seems to intimidate 

 their enemies. I did not meet with the Mycetes stramineus in any 

 other part of the Amazonian region. * * * On the Upper Amazons 

 the sole species seen was the Mycetes ursinus whose fur is of a shining 

 yellowish red color." This is doubtless M. seniculus. 



Alotjatta macconnelli Elliot. 



Alouatta macconnelli Elliot, Ann. Mag. Nat. Hist., V, 8th Ser., 



1910, p. 80; Allen, Bull. Am. Mus. Nat. Hist., N. Y., XXX, 



1911, p. 271. 



MACCONNELL'S HOWLER. 



Type locality. Coast of Demerara. *Type in British Museum. 



Geogr. Distr. English and French Guiana, Cayenne to coast north 

 of the Amazon. El Llagual, El Hacha, Paramo de Rosas, Venezuela, 

 (Carriker). 



Genl. Char. Upper parts unicolor from head, in adults. Under 

 parts and flanks orange red. 



Color. Head all around rich maroon red, entire upper parts golden 

 yellow, tips of hairs in certain lights fiery golden, base of hairs black ; 

 arms to elbows, under parts, and forearms deep orange red; hands, 

 legs below knees, feet and tail maroon red growing paler to tip. Ex 

 type British Museum. 



Measurements. Size same as A. seniculus. Skull: occipital 

 region wanting ; intertemporal width, 44.5 ; palatal length, 46.8 ; zygo- 

 matic width, about 86.8 ; median length of nasals, 21.3 ; length of upper 



♦The type lacks hands and feet; the coloring of these was taken from 

 another example. 



