SO Dr. D. G. Elliot on 



Type in British Museum, no. 93. 7.5. 1. 



This red Howler in general appearance resembles some- 

 what the Rio Juara species on the Rio Juara ; but is con- 

 siderably smaller, has less of the golden hue on the body, 

 and paler limbs and tail. 



Alouatta macconnelli, sp. n. 



Type locality. Coast of Demerara. 



Geoqr. distr. English and French Guiana, Cayenne to 

 coast north of the Amazon. 



Gen. char. Upper parts uuicolor; under parts orange- 

 red. 



Colour. Head rich maroon-red; entire upper parts and 

 flanks golden yellow, tips of hairs in certain lights fiery 

 golden ; base of hairs black ; arms to elbows and thighs and 

 under parts deep orange-red ; forearms, hands, legs below 

 knees, feet maroon-red ; tail maroon-red at base, growing- 

 paler towards tip. 



Measurements. Total length 1390 mm. ; tail 670. Skull: 

 occipital region wanting ; intertemporal width 44* 5 ; palatal 

 length 46*8 ; zygomatic width about 86*8 ; length of nasals 

 213; length of upper molar series 38*1: length of mandible 

 107*7 ; length of lower molar series 42*2. 



Type (adult) in British Museum, no. 8. 3. 7. 3. 



Tins form differs from A. seniculus in not having the dark 

 hues 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. 



Alouatta juara, sp. n. 



Type locality. Rio Juara, Peruvian Amazon. 



Gen. char. General colour golden-red ; arms and legs 

 darker. 



Colour. Head and whiskers bright marcon, darkest under 

 the chin ; upper parts of bod}' and flanks golden-red ; arms 

 and legs, hands and feet maroon, darker than body; under 

 parts and inner side of body red ; tail maroon at base, 

 grading into golden-red, similar to body. 



Measurements. Total length 1145 mm. ; tail 625 ; feet 130. 

 Skull : total length 126*3 ; occipito-nasal length 104*9 ; 

 intertemporal width 40*2 ; breadth of brain-case 54*5 ; hensel 

 106*2; zygomatic width 81*4 ; length of nasals 25*9; palatal 



