PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. I, pp. 289-322 October 7, 1911 



EXPEDITION OF THE CALIFORNIA ACADEMY OF 



SCIENCES TO THE GALAPAGOS 



ISLANDS, 1905-1906 



III 



THE BUTTERFLIES AND HAWK-MOTHS OF THE 

 GALAPAGOS ISLANDS^ 



BY FRANCIS X. WILLIAMS 



Assistant Curator of Entomology, Kansas University, 



Entomologist to the Expedition 



CONTENTS 

 Plates XX-XXI 



Page 



Introduction 290 



Rhopalocera 296 



Heterocera 3Q5 



Concluding Remarks .- 313 



Table Showing Insect Seasons 320 



Explanation of Plate XX 322 



^ Unless otherwise stated all the specimens collected on this expedition are in the 

 collection of the California Academy of Sciences, at San Francisco. 



September 18, 1911 



