A New Dictyophorodelphax from Kauai (Homoptera: Delphacidae)

The unusual endemic delphacid genus Dictyophorodelphax Swezey contains four previously described species; two from Oahu, and one each from Maui and Lanai. The discovery of a fifth species, described below, on the island of Kauai, suggests strongly that additional species probably await discovery elsewhere in the Hawaiian Islands. Dictyophorodelphax zwaluwenburgi, new species Female. Length, 5.5 mm.; cephalic horn from top of eye to tip, 2.4 mm. long, laterally compressed distad, apical third bent only slightly ventrad so that when viewed from side a forward prolongation of the straight portion of the ventral margin intersects the dorsal lateral carina at about its apex, ventral carinae becoming evanescent about halfway to tip, apparently joining dorsal lateral carinae slightly less than three-fourths distance from bases of these, sparsely clothed with short fine hair; tegmina, 1.7 mm. long, 0.7 mm. wide, covering slightly more than half of abdomen. Color predominately testaceous with dark markings. Cephalic horn brown ish with fine light flecking, laterally becoming darker along anterior part of ventral margin. Frons testaceous, becoming slightly darker anteriorly, fine fuscous lines along edges of carinae. Clypeus with a median longitudinal pale streak and two broad lateral convergent fusco-testaceous streaks which become narrower and darker apically, and extend onto base of labrum. Scapes of antennae with a dorsal longitudinal fuscous stripe and a ventral fuscous spot. Legs with longitudinal fuscous stripes on femora and tibiae, connected in a few places by irregular dorsal transverse fuscous bands, dark dorsal spot at apex of first segment of hind tarsi, apex of last segment of all tarsi dark. Tegmina with a narrow black mark along apical third of commissural margin of clavus, shorter but wider black mark near apex of costal margin, smaller less distinct black marks along apical margin between apical veins, small apparently non-setigerous black granules along veins. 22 Proceedings, Hawaiian Entomological Society Abdomen mottled with testaceous and darker areas, becoming flavous in a narrow stripe along median dorsal line; tip of ovipositor tinged with orange, anal style orange