282 ALOUATTA 



molar series, 38.1; length of mandible, 107.7; length of lower molar 

 series, 42.2 ; adult $. Ex type British Museum. 



This form differs from A. seniculus in not having the dark hue 

 on the upper part of the back, limbs, hands, feet and tail. The upper 

 parts and flanks in the adults are a rich golden hue from the nape to the 

 tail, and the under parts and limbs a beautiful orange red, quite different 

 from the typical style on the north western part of the continent. 

 Allen (1. c.) gives the following account of this species from Carriker's 

 notes : 



"The three specimens from northern Venezuela do not differ 

 appreciably in color or otherwise from four others from El Llagual 

 and Rio Mocho. There is a noteworthy sexual difference in color, the 

 males being much more intensely colored throughout than the females. 



"Common on the Caura and on the Cuyuni, and in less numbers 

 most everywhere from sea level up to 4,000 feet (La Cumbre de Valen- 

 cia), where heavy forest is found. Its presence is always quickly 

 revealed in a locality by its tremendous roaring, which is really quite 

 awe-inspiring. They are sluggish, morose brutes, impossible to tame, 

 and are more often found in pairs or families than in troops. They will 

 sit curled up for hours in the top of some giant tree, and as long as 

 they believe themselves unseen, will not move, but even when dis- 

 turbed, never move with the speed or agility of Cebus or Ateles ( !) 



"I have found them to be much troubled with 'screw worms,' 

 especially around the neck. Other species seem to be able to remove 

 them, as a rule. They are very tenacious of life, clinging to a branch 

 after being riddled with shot, and even after death, only dropping 

 after rigor mortis has passed and released the contracted muscles. 

 They invariably howl at the first break of day and usually before a 

 rain-storm. They are invariably very lean of body, being in that 

 respect different from the other species, which at times are found 

 exceedingly fat." 



Alouatta insulanus Elliot. 



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

 1910, p. 79. 



TRINIDAD HOWLER. 



Type locality. Island of Trinidad. Type in British Museum. 



Genl. Char. Size small, color nearly uniform throughout, limbs 

 only slightly darker than the body. 



Color. Head and whiskers maroon, darkest on chin and throat; 

 upper part of body and flanks red, in certain lights with a golden 



