PREFACE 
This is a cooperative venture between the Trinidad and Tobago 
Department of Agriculture and the United States Fish and Wildlife 
Service. The project was suggested by the Bureau of Sport Fisheries 
and Wildlife to the senior author who has been associated with them 
for a number of years and still continues to cooperate through his 
curatorship with the Royal Victoria Institute Museum, Trinidad. 
The problem of bats infesting dwelling houses is almost world- 
wide and these studies have a direct application to this problem in 
the Southern United States and Puerto Rico, as well as any area where 
free-tailed molossid bats are found. The work was conducted in 
Trinidad rather than in the United States of America because the 
problem is ever acutely present in Trinidad. 
Arthur M. Greenhall is Curator of the Royal Victoria Institute 
Museum, Trinidad, West Indies. Gerald Stell, formerly of the Depart- 
ment of Agriculture, Trinidad and Tobago, is now Chief Plant Protection 
Officer of the Department of Agriculture, Jamaica, West Indies. 
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