THE LOW ENTRANCE TO THE BAT CAVE ON THE CHILIBRILIO RIVER OPENS INTO A 
SERIES OF LONG CORRIDORS AND CHAMBERS MORE OR LESS INTERCOM MUNICATING 
T° 
FLASHLIGHT OF A SMALL CI,USTER OF BATS BEFORE THEY WERE AIARMED 
Clusters are ordinarily formed of a great number of individuals, probably several hun- 
dred in some instanees. The variety shown is one of the largest of South American bats, 
one specimen secured having a wing expanse of 26 inches. The bats are strong and muscular 
and always ready to bite. The masses of bats bear a close resemblance in form to the 
stalactites with which the walls and domed ceilings are covered. 
184 
