169 



fard at his house at Kilaiiea Hawaii ; during my stay we 

 spent considerable time collecting in the neighborhood and 

 made a hurried trip to the lava flows of South Kau. Most 

 of my collecting was confined to Homoptera, but Mr. Gif- 

 f ard gave more attention to Hymenoptera ; between us w^e 

 collected nineteen species of Delphacids, four of which I 

 describe as new species and one as a new sub-species. Upon 

 naming up this material I soon became interested in several 

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

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

 Orient compelled my early departure from Honolulu, 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 Ivilauea, mentioned above, was cotypes of certain species 

 belonging to the Bishop Museum, collections made by Messrs. 

 Swezey, Giffard and Fidlaway during 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 

 unfortunate that I was not able to examine the types of 

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

 some doubt as to certain of them.* 



PABT I. 



SYSTEIMATIC. 



The first Hawaiian Delpliacid to be described was Delphax 

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

 moelcola Kirkaldy (pulchra being preoccupied in Delphax). 

 In 1904 Kirkaldy described Aloha ipomoeae as a new genus 

 and species, and also Megamelus leahi, which he afterward 

 placed in Nesosydne. In 1907, 1908 and 1910 a number of 

 new species and genera were described by the same author 

 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 Mr. Giffard will present the Society with full notes on these 

 collections. 



