370 
Kuwayama gracilis is represented from several points on 
Oahu and several specimens collected on Maui (Iao Valley and 
Kailua) appear to belong to this species, but show a strong 
tendency to revert to Trioza in having genal cones. This 
genus is distinguished from Trioza by the absence of genal 
cones, the paired projections on the front of the head. The 
fact that several species from widely separated regions have 
been referred to this genus and the further fact that each of 
these species appears to be more closely related to certain Trioza 
species in the same region than to other Awwayama_ species 
elsewhere, would seem to indicate that the absence of genal 
cones is a characteristic derived independently in different 
localities as parallel evolutional development. 
The Maui specimens of K. gracilis and one specimen from 
Oahu appear to belong to this species without much doubt, 
except that the genal cones are not wholly wanting. Whether 
these particular specimens really represent another species or 
not is left for further study to determine. 
Kuwayama minuta is represented by a considerable number 
of specimens from Kauai (Summit Camp). 
The other species in the collection present nothing of notable 
interest. | 
