306 Occasional Papers Brniicc P. Bishop Miiscitiii 



we have now been able to examine material representing- all of the 

 very doubtful forms recorded, excepting- Oiiiscosoiua pallida Brun- 

 ner and Coiioccphaloidcs !ia:<.'aiiciisis Perkins, material of these 

 species being- at present lacking in the Hawaiian collections. Mr. 

 Swezey has sent us for study a rich series from the collections of 

 the Experiment Station of the Hawaiian Sugar Planters' Associa- 

 tion, the Territorial Board of Agriculture, the Bernice P. Bishop 

 Museum, and from the private collection of Mr. P. H. Timberlake. 

 The total probably represents a larger collection than had pre- 

 viously been reported on, and we take the present opportunity to 

 describe the new species included and make the numerous correc- 

 tions necessary to place the nomenclature on a more secure basis. 



We take great pleasure in expressing our hearty thanks 

 to Mr. O. H. Swezey for his exceptionally valuable aid, and also 

 to Dr. C. M. Cooke, who has saved us many weary hours of search 

 in locating the numerous localities recorded in the following pages. 



The conclusions in the present study are based on a compari- 

 son of the material from Hawaii with that in the collections of the 

 Philadelphia Academy of Sciences, where are represented most of 

 the species with which Hawaiian forms have been confused. 



Much remains to be done, we believe, in determining the actual 

 number of forms native in Hawaii, their geographic, racial, or full 

 specific significance and their geographic distribution. In some 

 species there are also striking, though less important, variants that 

 can be satisfactorily understood only after much collecting has been 

 done, with careful observation as to the efifect of local environ- 

 mental conditions, of soil, humidity, and vegetation. 



A total of six hundred and eighty-eight specimens has been 

 examined, representing forty of the forty-one genera and all but 

 two of the adventive species that have been recorded from Hawaii. 

 A large proportion of the native species have undoubtedly been 

 represented, but the questionable validity of a number of described 

 forms gives rise to doubt as to the actual number of species 

 indigenous to the islands of Hawaii. 



The Hawaiian Dermaptera and Orthoptera are grouped as 

 follows : 



[4] 



