507 

 OCTOBER 7th, 1920. 



The 181 St meeting of the Hawaiian Entomological Society 

 was held at the usual place. Present: Crawford, presiding; 

 Swezey, Mant, Giffard, Timberlake, Muir, Whitney, Ehrhorn, 

 and Fullaway. 



The minutes of the 178th and 180th meetings were read 

 and approved. 



ENTOMOLOGICAL PROGRAM. 



New Hawaiian Delphacidae (Homoptera). 



]!Y F. :muir. 



The present paper deals with part of the collections made 

 by Mr. W. M. Giffard and not dealt with in my last paper,''' 

 and with collections made by Messrs. Timberlake and Giffard 

 in 1919, also with a few other species. They add eleven new 

 species and one variety to our list, as well as new localities. 

 A number of species in the collections are not mentioned as 

 they are not new. That such a well worked locality as Castle 

 trail, Oahu, should yield new species indicates that we are far 

 from the end of our list of species. While it is hoped that 

 the recently introduced Miridae, Cyrtorhinus mundnlus (Bred.), 

 will be of benefit in the cane field and reduce the number of 

 Perkiftsiclla saccharicida Kirk., it is to be hoped that it will 

 not take to the native forest and interfere -with the native 

 Delphacidae. 



The genus Ilhnrnia White now stands as the second largest 

 genus in the family with eighty species ; Delphacodes Fieb. 

 (Liburnia) being the largest with about 180 species. 



With the increase in the number of species some of them 

 are becoming more difficult to define, even by the genitalia ; 

 at the same time isolated forms such as /. sulcata are turning 



* Proe. Haw. Ent. Soe. IV. 1. (1919) p. S4. 



Proe. Haw. Ent. Soc, IV, No. 3, September, 1921. 



