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91 
New and Little Known Hawaiian Delphacidae (Homoptera). 
BY F, MUIR. 
(Presented at the meeting of December 1, 1921.) 
The present paper deals chiefly with Delphacidae from the 
island of Kauai collected by Mr. O. H. Swezey, and a few by 
Mr. J. A. Kusche. They are of interest, because much less 
collecting has been done on that island than on the others, and 
we were unable to state whether the few species known from 
there indicated a natural paucity or only the limited amount 
of collecting. 
The present collection was over a wide enough area to give 
us some better idea, and the fact that all the known Kauai 
species except three, as well as nine species described as new, 
were taken indicate that it is fairly representative. It consists 
of nineteen species in all, the Leialoha group with ten, the 
Aloha group with eight, and one Kelisia. An equal amount 
of collecting in Oahu, Maui or Hawaii would have produced 
a much larger number of the Aloha group. I think we are 
justified in considering Kauai as poor in Delphacidae and hav- 
ing a higher proportion of the Leialoha group than the rest 
of the archipelago. 
Mr. Swezey’s collections were made at the following eleva- 
tions: Alakai swamp, 4000 feet; Nualolo, 3000; Kalalau, 
Kumuwela, Kokee, Halemanu, and Kauaikinana, 3500 feet. 
Types deposited in the H. S. P. Experiment Station Col- 
lection. 
Leialoha Kirk. 
The present collection contains some long series of species 
of this genus, the study of which has decided me to consider 
as species forms I have described as subspecies. The amount 
of evolution that has taken place in the Leialoha group is not 
near so great as in the Aloha group, and the differentiation of 
the male genitalia has not proceeded so far. We must not, 
therefore, expect the same amount of specific difference in these 
organs in the former as in the latter. 
Leialoha lehuae Kirk. 
Two male specimens from Kokee, Kauai, and one from 
Alakai swamp (Swezey, August, 1921). 
Proec., Haw. Ent. Soc., V, No. 1, October, 1922. 
