58 
The lectures will be illustrated by lantern slides and otherwise, 
They will close in time for auditors to take the 5.32 train from 
the Bronx Park railway station, arriving at Grand Central Station 
at 6.02 P. M. 
A COLLECTING TRIP TO BOLIVIA.* 
Leaving New York July 9, 1901, I took a through steamer to 
Colon, crossed the isthmus to Panama, where I met the other 
three members of our party, and proceeded down the South 
American coast to Mollendo, the chief port by which one enters 
Bolivia, landing at that place August 4, twenty-six days out 
from the city. The steamer made various stops along the Pacific 
coast and at Payta I obtained ten or eleven species of plants that 
were of interest, growing as they did in the sand and rocky 
ravines in a region where rain is said to fall only once in five or 
six years. The specimens were subsequently lost; among them 
were represented two bushes, each attaining a height of five or 
six feet, but never, apparently, producing fruit. 
From Mollendo an excellent railway to Lake Titicaca carries 
one in eight or ten hours to Arequipa, at an elevation of 7,500 ft. 
The first part of the route and up over the first hills to an eleva- 
tion of between 3,000 and 4,000 ft. has considerable vegetation, 
small trees or bushes growing along the few streams and various 
shrubby plants, grasses, etc., on the hillsides and in the ravines. 
After ascending this first range the road passes through a com- 
paratively level tract that seems to be an absolute desert, extend- 
ing over many hundreds of square miles. From the train there 
was nothing living to be seen, either plant or animal, as: far as 
the eye could reach in all directions, except along the track at 
the stations. It is in this desert that the curious moving sand- 
hills occur. Apparently the higher winds all blow from one 
direction, sift out the light colored sand, lighter also in weight, 
I f rep i f The Poa Mr. R. S. Williams, Museum 
Aid, was detailedio m leave ¢ Bolivia in July, 1901. 
Mr. Williams made very ee Goliections: which are now being studied by Dr. Britton 
and Dr. Rusby. 
