Colour brownish to ochraceous marked with black. Head black with ochraceous along inner margins of eyes at apex of tylus and on elevated portions of bucculae. Pronotum ochraceous with black callosities and punctures and brown along posterior margin on either side of the middle, extending across humeri which have narrowly yellowish hind margins. Disk also dark brown at centre behind callosities. Scutellum almost entirely dark brown to black except for ochraceous apical carina. Clavus and corium ochraceous irregularly but generally covered with pitchy brown over a large portion of clavus and over corium except basally and subapically, the apical margin of corium dark brown to black apically and between inner angle and joining of vein Cu. Membrane clear hyaline except for distinct piceous area on either side at middle of apical margin of corium. Connexivum alternated, being black, with white at sutures of segments. Under-surface dark brown to black, with paler glabrous coxal flanges and with the venter variegated, especially posteriorly. Rostrum piceous, antennae black with the joints between segments somewhat paler and with the last segment brownish. Legs brownish, the coxae ochraceous apically. Femora black spotted beneath and entirely black above, with ochraceous apices, tibiae black subbasally and apically, and tarsi infuscated apically. Size: male, length 5·05 mm., width (hemelytra) 2 mm.; female, length, 5·22 mm., width (hemelytra) 2·22 mm. Holotype, female (British Muscum), Stewart Island, 1926 (Harris) and allotype, male, same data, in my collection. Perhaps closest to chinai, from which it differs in its more robust form, shorter rostrum, and shorter female genital cleft. The male is very much darker, but is not in perfect condition, so this may not be a natural situation. A female is before me from Lyttelton, New Zealand, October, 1901, to November, 1902, J. J. Walker, and a male from Mount Cook, January, 1909, which are very close to stewartensis, differing only in the presence of a distinct branch of R + M. Whether these prove to be the same or a distinct species will depend upon further material in better condition. References. Dallas, W. S., 1852. List of the specimens of Hemipterous insects in the collection of the British Museum, London, part II, pp. 369–592, 4 plates. Evans, J. W., 1929a. A new species of Nysius from Australia, Bull. Ent. Res., 19: 351–354, 3 figs. —– 1929b. New species of Nysius from South Africa. Bull. Ent. Res., 20: 267–270, fig. 1. Fabricius, J. C., 1794. Entomologia Systematica, Hafniae, Tom. IV, 472 pp. —– 1803. Systema Rhyngotorum, Brunsvigae, x + 314 pp., Emendanda et Index Alphabeticus. Myers, J. G., and China, W. E., 1928. A list of New Zealand Heteroptera with the description of a remarkable green Aradid representing a new genus, Ann. Mag. Nat. Hist. (10), 1: 377–394, 2 figs. Stal, C., 1868. Hemiptera Fabriciana, 1. Kongl. Svenska Vet.-Akad. Hand., Band 7, no. 11, pp. 1–148. Usinger, R. L., 1941. The genus Nysius and its allies in the Hawaiian Islands, B. P. Bishop Museum Bulletin 173 (in press). White, F. Buchanan, 1878. List of the Hemiptera of New Zealand, Ent. Month. Mag., 15: 31–34.