PROCEEDINGS 
OF THE 
CALIFORNIA ACADEMY OF SCIENCES 
FourTH SERIES 
Vot. II, Pr. II, No. 17, pp. 311-346, pl. 18, Text Ficurzs 1-11 
December 30, 1920. 
EXPEDITION OF THE CALIFORNIA ACADEMY OF 
SCIENCES TO THE GALAPAGOS 
ISLANDS, 1905-1906 
XVII 
DERMAPTERA AND ORTHOPTERA 
BY 
MorGAN HEBARD 
During the years 1905 and 1906, an expedition under the 
auspices of the California Academy of Sciences visited the 
Galapagos Islands. One of the members, Mr. F. X. Williams, 
concentrated his efforts on collecting insects and a considerable 
series of Orthoptera was secured. This material has been 
placed in our hands for study, and the results are incorporated 
in the present paper. Over five hundred specimens have been 
examined, representing eighteen genera and twenty-eight 
species and races, of which one is here described as new. 
We take the present opportunity to thank most heartily Dr. 
Barton Warren Evermann, Director of the Museum of the 
California Academy of Sciences, for enabling us to undertake 
this task, and Mr. E. P. Van Duzee, Curator of Entomology 
of that institution, who has not only prepared and shipped the 
material to us with the greatest care, but has also aided in sup- 
plying such field notes as were made. 
December 30, 1920. 
