169 



fard at his house at Kihinca Hawaii ; dnrinji: my stay we 

 spent considerable time collecting in the neighborhood and 

 made a hnrried trip to the lava flows of Sonth Kau. ]\rost 

 of my collecting was confined to nonio])tera, bnt Mr. Gif- 

 fard gave more attention to Hymenoptei-a ; between ns we 

 collected nineteen species of Delphacids, four of which I 

 describe as new species and one as a new snb-S])ecies. Upon 

 naming np this material I soon became interested in several 

 problems and fonnd it necessary to revise the genera. Un- 

 fortnnately my time was very limited, as field work in the 

 Orient compelled my early departnre from llondlulu. and 

 this paper has had to be finished in the Orient, away from 

 collections and libraries. 



The material I had at my disposal, besides that collected 

 at Kilauea, mentioned above, was cotypes of certain species 

 belonging to the Bishop Mnsenm, collections made by Messrs. 

 Swezey, Giifard and Fnllaway dnring the last several years 

 and a few odd specimens left over by the late Mr. Kirkaldy 

 from material collected by Dr. R. C. L. Perkins. It was 

 iinfortnnate that I was not able to examine the types of 

 Kirkaldy's species, now in the British Mnsenm, as there is 

 some doubt as to certain of them.* 



PART r. 



SYSTEMATIC. 



The first Hawaiian Delphacid to be described was Delphax 

 puJchra by Stal in 1854; it is now known as Nesosydne ipo- 

 inocicola Kirkaldy (pulchni being precx'cupied in Ddpha.v). 

 In 1904 Kirkaldy described Alolia ipomoeae as a new genus 

 and species, and also Megamelus leahi, which he afterward 

 placed in Nesosydne. In 1907, 190S and 1910 a nnmber of 

 new species and genera were described by the same anthor 

 in the Proceedings of this Society and in the Fauna Hawa- 

 iiensis. In 1907 Swezey described the extraordinary genus 



♦Subsequently I have examined long series collected by Mr. W. 

 M. Giffard at Kilauea, Hawaii, and Tantalus, Oahu. These were col- 

 lected very carefully to verify the reported food plants; they have 

 enabled me to correct certain errors and prevented some synonymies. 

 I hope I\Ir. Giffard will present the Society with full notes on these 

 collections. 



