184 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 



developed subcircular pad at the base of the thumb, and therefore 

 does not differ from M . minutus in that respect. 1 



Measurements taken from the alcoholic specimen are as follows: 

 Total length 82; head and body 48; tail 34; lower leg n; hind foot 

 7.5; forearm 39; third metacarpal 39; fifth metacarpal 24. Measure- 

 ments of the skull are: Greatest length 15.7; basal length 14.8; zygo- 

 matic breadth 9.4; mastoid breadth 8.9; breadth across lachrymal 

 processes 6; interorbital constriction 3.5; occipital depth 5.3; upper 

 toothrow, without incisors, 5.7. 



Molossus obscurus Geoffrey. DUSKY MOLOSSUS. 



Eleven specimens: Yurimaguas (i), Moyobamba (10). 



This bat, like Hemiderma and Glossophaga, roosts about buildings 

 but usually in less accessible places, and is therefore not so easily ob- 

 tained. Average measurements of nine specimens: Total length no 

 (105-114); tail 39.88 (37-45); hind foot 9.3 (8-11); forearm (dry) 40.3 

 (38.5-41.8). 



Cebus macrocephalus Spix. BROWN CAPUCHIN MONKEY. 



Four specimens, Tambo Yaku, near Rioja. 



Although monkeys are said to be common throughout the montagna 

 along our route, we encountered them only once. A small troop passed 

 near our camp at Tambo Yaku July 5 and after two had been shot some 

 of the others lingered in the vicinity until the following day, when two 

 more were killed. They were rather shy and easily started into flight; 

 but they seemed to rely only on their speed and agility in getting away, 

 without any attempt at quick or crafty concealment. When started in 

 a given direction they continued even though it took them almost 

 directly over the cause of their alarm. This species and most other 

 monkeys of the region are much sought as food and they are therefore 

 steadily becoming scarcer near regular routes of travel. We sampled 

 their flesh and found it so well flavored that we preferred it to fresh 

 peccary meat, which was available at the same time. Monkeys are 

 reported as far west as Tambo Almirante at an elevation of about 5,000 

 ft. and not more than 40 miles east of Chachapoyas. 



Reference of these specimens to Cebus macrocephalus is provisional. 

 They agree fairly well with the colored figure given by Spix and to a 

 considerable degree with the description and measurements published 



1 Cf. Miller, Bull. Amer. Mus. Nat. Hist., XII, p. 176, 1899. 



