NO. 30 



SMITHSONIAN EXPLORATIONS, [QI2 



7> 



to the damming of the Gatun Lake. The old trails through the 



swamp and forest were flooded knee-deep, and the water rose half 

 a foot a day during his stay. This handicapped the collector's work 

 considerably, as all the operations had to be carried on from a dugout 

 canoe. The remaining hilltops, however, proved all the richer in 

 insect life, as well as in other animal life. The augmentation of the 



Fig. 78. — Tied up fur the night, on the upper Chagres 

 River. Photograph by Hildebrand. 



mosquito fauna proved as interesting as it did annoying to the 

 collector. 



About the middle of June, Mr. Busck returned from this locality, 

 which in another few months would become totally submerged, 

 departed for New York, and arrived in Washington June 24. 



Dr. C. D. Marsh, of the Bureau of Plant Industry, accompanied 

 the survey party to the Canal Zone to make typical collections of the 

 plankton organisms in the fresh waters of the Atlantic and Pacific 

 slopes of the Isthmus, lie arrived at Cristobal on January 15. [912, 



