558 FAUNA HAWAIIENSIS 



Nesophrosyne Kirkaldy. 



N^esophrosyne Kirkaldy, 1907, Proc. Haw. Ent. Soc. i. p. 160. 



Typa perkmsi. This genus is closely allied to Nephotettix, but the venation will 

 separate it'. Typically there are two discoidals, the median cell (interior discoidal) 

 running undivided to the subapical line ; there is only one normal subapical cell, which 

 is a little constricted medianly, but in all the species but two, a second subapical cell is 

 formed by the forking and quick reunion of the radial vein, this small cell being one- 

 third of the length of the other subapical cell, and of course pedicellate at both ends. 

 This small subapical is joined at its base by a straight cross (nodal) vein to the 

 subcostal vein, sometimes there are other nodals. There are four apical cells and 

 a well-defined appendix. The pronotum is very short at the sides. In two species, 

 however, insjtlaris and oceanides, the exterior subapical cell has disappeared^ 

 These two last may form a subgenus Nesoreias (type insularis). N. haleakala I 

 formerly separated subgenerically, on account of the longer head and shorter wings, 

 but N. halemanu seems to form too strong a link with the more typical species. 



This genus — Nesophrosyne — is the most difficult of the Hemipterous genera of these 

 islands to deal with specifically. It is impossible in some instances, from the material 

 before me, to say whether certain forms are species or only local varieties. A much 

 more adequate material, a knowledge of the range of variation, of the foodplants, and of 

 the nymphs, is necessary before the synonymy can be settled. The variation in some 

 forms known to me is quite bewildering. 



(a) Subgenus typicum. 



(l) Nesophrosyne umbratilis, sp. nov. 



^ black ; a longitudinal stripe down the vertex, the face (base excepted), sterna, 

 legs, scutellum (except the lateral angles broadly) white. Ocelli red. Tegmina black, 

 three pale yellowish elongate spots basally and two white ones apically, on clavus ; four 

 (or so) obscurer ones on the apical cells internally, and a broad white exterior band 

 from near the base to near the apex, broken only by the dark fuscous first apical vein. 

 Tergites black, laterally pale ; sternites basally and laterally whitish, the rest — including 

 the valve — black, except the creamy plates which are fringed with fine, short, pale hairs. 

 Vertex produced about two-thirds of the length of an eye beyond the eyes, a little 

 longer than wide at base. Length 4 mm. 



Hab. Kauai, Kalihiwai, 400 ft. (Oct., Giffard), on fern (probably Microlei>ia 

 strigosa). 



A striking species, of which only a single male is yet known. 



' This is figured 1908, P. Haw. E. S. i. textf. 3, on p. 208. 



^ In one species the exterior cell is open exteriorly in one example, the only exception I have seen. 



