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If so, it may indicate that none of the vocal performances heard today was purely hostile. And this, in turn, would support the hypothesis that the inds. heard today were all members of the same social group. 

[[circled]] 7 [[/circled]] Some of my earlier notes stress resemblances between the vocal repertories of Sakis? and Titis. The resemblances must be real. But the Sakis heard today did not have anything like a "titi gestalt".  Probably they sounded particularly distinctive because I missed Moans and Whistles. But this can hardly explain all the differences. 

July 5, 1969
El Pepino

Going to work in same area again this morning.

Start out a little earlier. Arrive lower edge of upper forest 6:21 am. Sky partly overcast. Forest seems fairly quiet. Only a few bird songs and calls.

Birds a little noisier by 6:30 The sun is coming out. I reach area where [[underlined]] torquatus [[/underlined]] seen yesterday 6:45 am. No primates visible or audible - yet. 

The [[underlined]] toquatus [[/underlined]] here certainly seem to vocalize less frequently than all or most of the [[underlined]] moloch [[/underlined]] I have studied elsewhere. The difference could be innate. More probably just a reflection of the fact that the population of