124 FAUNA HAU'AIIENSIS 



(6) Olianis orono, sp. nov. 



Plate IV. fig. lo. 



Somewhat like O. opitna, but larger and stouter, vertex longer, con\erging anteriorl\-, 

 and acutangulate apicall}'. 



Testaceous, legs and scutellum fuscous, abdomen black. Tegmina yellowish 

 hyaline (at least in part), nervures particoloured, brownish-black and whitish or 

 yellowish. Tegminal hairs black. Base of corium irregularly darkly nebulose, a dark 

 band across the middle, ape.x sparsely spotted. Costal area immaculate. Stigma 

 pallid. Frons pallid. Width of head across eyes about twice as great as length of 

 verte.x, which is one-third longer than wide at base, five-sevenths wider at base than at 

 apex, slightly produced in front of the eyes, apically acutangled. Forehead distinctly 

 bicarinate. Tegmina 3'i times as long as broad medianly. 



$. Rostrum reaching to apex of posterior coxae. 



$. Rostrum reaching well beyond apex of posterior coxae. 



Long. 6 mm. (to apex of abdomen) ; 8^ mm. (to apex of tegmina) ; expanse 

 1 6^ — 1 7 mm. 



Hab. Kauai, 4000 ft. (July). 



(7) Olianis koaiwa, sp. nov. 



Plate IV. fig. II. 



Black ; tegmina hyaline, immaculate, nervures pallid except the apical ones which 

 are fumate. Costa somewhat fumate. Tegminal hairs black. Stigma blackish-brown. 

 Legs sordid testaceous. Vertex long, narrow, lateral margins subparallel, narrowing a 

 little anteriorly, subrectangular apically ; vertex two-thirds longer than wide at base, 

 one-half wider at base than at apex. Tegmina nearly three times as long as wide 

 medianly. 



Long. 5 mm. (to apex of abdomen) ; 65 — 8 mm. (to apex of tegmina) : expanse 



J 3—130 'Tim- 



Hai!. Widely distributed throughout the group. 



There are also a number of forms which apparently difter from the above only by 

 the vertex being truncate apically, and others, with tegmina varyingly spotted, which 

 I have not yet cleared up to my satisfaction. 



Subfam. ASIRACINAE. 



{— Delphacida Stal.) 



The investigations upon this group are not yet complete and will form part of a 

 subsequent communication. The only species yet recorded is 



'' Ddphax" piihhra Stal, 1854, Oefv. \'et. Akad. Forh. xii. p. 246, from Oahu. 



