190 



along femora and a faint band toward apex of tibiae, tarsal joints 

 fuscous; abdomen dark brown, yellowish at base. Tegmina hyaline, 

 yellowish, a dark brown mark at end of clavus and another at end of 

 costal cell spreading across disk and forming a band, lightest in 

 middle, veins concolorous as membrane with very minute granules 

 or with none, base of claval margin dark. 



The "ankle knob" of styles developed to a slightly curved blunt 

 point; spines on anal segment medium size, flattened laterally, sharply 

 pointed; aedeagus sharply bent near apex, a semicircle of spines 

 running from dorsal point near apex, across right side to a ventro- 

 apical point. 



Length 2.8 iniii. ; tegmen 2 mm. 



2 Brachypterous, tegmina not reaching apex of abdomen. In 

 general color lighter than male. 



Length 2.9 mm. ; tegmen 2.S mm. 



Hab. Hawaii on Mamaki (Pipturus alhidus^ ) ; Olaa (Per- 

 kins, November, No. C35) ; Kilauea (Giffard, July; Giffard 

 and Muir, January); Waimea (Swezey, October). 



This is the most common Delphacid around Kilauea in 

 January; it does not agree with any published description. 

 It varies in color to very light forms in which' the carinae of 

 pro and mesonotum are light, and even all the head and thorax 

 without dark markings; the markings on tegmina are some- 

 times reduced to a small spot at end of clavus and another at 

 end of costal cell, but the dark color on veins does not always 

 fade with that in cells; in some cases the infuscation extends 

 to near base and apex along veins. It is possible that this is 

 umbratica Kirkaldy, but the description is useless for identi- 

 fication. 



PL 2, fig. 41; PI. 4, figs. 70, a-b. 



13. N. perhinsl sp. n. 



^ Brachypterous, tegmina reaching to near apex of abdomen; 

 antennae reaching beyond middle of clypeus, first segment more than 

 half the length of second; furcation of frontal carina about middle 

 of frons. 



Head dark brown, antennae and carinae light brown; pronotum 

 dark between carinae, which are light, the lateral portions lighter 

 than middle; mesonotum dark brown; abdomen dark brown, lighter 

 at base, on pleura and a mark down middle of dorsum; pleura of 

 thorax and front and middle coxae dark, rest of legs light brown or 



*Mr. Giffard has taken this off of Stenogyne and Clerviontia. 

 There is also a long-winged form which is somewhat darker than 

 the short-winged ones, the tegmina light brownish with darker veins. 



