NO. 30 



SMITHSONIAN EXPLORATIONS, [QI2 



60 



and investigated the caves more thoroughly than had been possible 

 previously. It was found that there is an upper series of dry caves 

 and a lower scries containing water. In the rainy season these latter 

 become inaccessible subterranean rivers, and it was in them that the 

 interesting bat-fauna was found, which Mr. G. S. Miller, [r. has 

 described in the Proceedings of the IT. S. National Museum. 



The last part of March was spent on the upper Trinidad River 

 where exceedingly rich entomological results were obtained, partly 

 through the night work with the acetylene lamps. Early in April 

 Mr. Busck went to Porto Bello on the Atlantic side. From that 



m 



Fig. j^. — Porto Bello Bay, showing excavation in the mountain, where the 

 mck used fur the Gatun ham was secured. Photograph by Busck. 



place he made several trips with good results, hut on one of these. 

 up the coast to the Santa Rosa River, he unfortunately became ill 

 and was forced to go to a hospital. Having recovered, lie proceeded 

 a week later to La Chorrera where the rainy season was at is height 

 and the collecting proved excellent, lie established himself there 

 for two weeks, collecting beyond the savannah area in the foothills 

 near the origin of the Trinidad River. The acetylene lamps and the 

 white trap-sheets proved valuable adjuncts to the outfit, and much 

 material was secured by collecting at night. 



The last part of May was occupied with minor excursions in or 

 near the Canal Zone; among these a short trip up the Chagres River. 

 < >n (line 1, he undertook a second trip up the Trinidad River, and 

 found conditions quite different from what they were before, owing 



