91 



on ventral aspect, three small curved spines near middle of dorsal aspect 

 and one smaller spine more distad on right and two on the left side. 



Black or brown ; antennae, carinae of head and thorax lighter, legs 

 brownish with darker longitudinal marks, apical tarsi brown, base of 

 abdomen, dorsal aspect and edges of pygofer and a narrow stripe down 

 abdominal dorsum j^ellowish or light brown. Tegmina hyaline slightly 

 opaque or milky white with slight infuscation over the middle area veins 

 concolorous as membrane with black granules bearing black hairs, a dark 

 mark at apex of clavus and another at apex of costal cell and at apex 

 of cubitus. 



Female. Brachypterous ; length 2.4 mm.; tegmen 1.7 mm. In color 

 lighter than the male, being light brown. One female, perhaps imma- 

 ture, being yellow with tegmina immaculate except for the black granules 

 which are very small. 



Habitat. Haleakala, Maui, about 7000 feet elevatiou ( near 

 the small crater of Puu Nianiau) on Argyroxiphium virescens. 

 (Bridwell, August 1918). Described from two males, four 

 females and one nymph. The nymph is dark brown, lighter on 

 carinae, at base of abdomen and mottled over tegminal pads. 



This species comes near to /. tetra^nalopii. 

 I. cyathodis (Kirk.) 



The forms associated under this species are of great interesr 

 as among them we have considerable chrootic but practically 

 no phallic differences. Among continental faunae the differ- 

 ences found in such a form as eeke would be considered as of 

 generic value, judging by some of the European and American 

 genera. But as my studies of Hawaiian Delphacidae have 

 been primarily based upon the genitalia, and as there is no 

 doubt as to the close affinity of the forms in question, I prefer 

 to associate them under njathodls as subspecies and varieties, 



After examining the new material from Maui I consider 

 fullawayi as of only varietal value. The five forms T now 

 class as follows: 



Ilhurnia cyathodis (Kirk.) 

 var. fuUaivayi (Muir) 

 var. lanaiensis (Muir) 

 var. nigrinervis Muir 

 suh-siDccies eel-e Muir. 



