IO ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 



A COLLECTING TRIP IN BOLIVIA. 



Wishing to secure, if possible, a complete collection of the 

 various forms of Diurnal Lepidoptera native to the districts 

 near La Paz, Bolivia, I was fortunate in securing the ser- 

 vices of Mr. Wm. J. Gerhard, assistant entomologist at the 

 Academy of Natural Sciences in Philadelphia. Mr. Gerhard 

 sailed from New York in September, 1898, planning, through 

 letters of introduction to various officials in Bolivia, to com- 

 plete his outfit without much delay, and to make trips inland 

 of several months' duration each. He returned after sixty 

 weeks' absence, in excellent health after his experiences. 



Mr. Gerhard did not reach the low tropical district of 

 eastern Bolivia, his collecting covering mostly the high alti- 

 tudes of the western district. The first shipment. of butterflies 

 was very strong in Hesperidae, with scarcely any Papilios. 

 As he collected thoroughly in districts offering little attraction 

 compared with the tropical districts, his captures were perhaps 

 more valuable scientifically than they would have been had he 

 sought a more popular country. It is also interesting to 

 note that the collection represents all seasons. 



The following account of his travels is taken by me from 

 his letters. 



ANDREW G. WEEKS, JR. 



Boston, February, 1901. 



