540 FAUNA HAWAIIENSIS 



(8) Nysms coenosuhis Stal. 



Nysius coenosulus Stal, 1859, Eugenics Resa, Zool. p. 243; F. B. White, 1878, 

 A. M. N. H. (5) I. p. 369. 



Through the kindness of Dr Aurivillius, I was able to see the type — unfortunately 

 in poor condition — of this doubtless introduced species. It occurs in mixed sweeping, 

 principally, I think, on Erigeron canadensis. 



Hab. Oahu, near Honolulu (Perkins and others) ; Waianae Coast (March, 

 Perkins). — Lanai, 3000 ft. (Perkins). — Hawaii, 2000 — 4000 ft. (Perkins). 



(9) Nysms blackburni White. 

 Nysius blackburni F. B. White, 1881, A. M. N. H. (5) vii. p. 53. 

 Hab. Hawaii, Kilauea, 4000 feet on ferns (White). I do not know this. 



(10) Nysius lichenicola, sp. nov. 



Head and pronotum yellowish testaceous, closely punctured, and more or less 

 suffused, with dark brown ; lateral margins of head, anterior third of pronotum, 

 posterior margin very narrowly (usually interrupted medially and at the lateral angles), 

 scutellum etc., dark. Tegmina typically yellowish testaceous, closely irrorated with 

 blackish grey, usually more so towards the middle, apical angle of corium dark. 

 Membrane vitreous, variegated varyingly with brownish grey, apical angle usually 

 blackish. Antennae, labium, femora etc., blackish or piceous ; coxae and apex of 

 femora testaceous or pale ferruginous. Underside black, orifices dark testaceous. 

 The fourth segment of the antennae is about twice as long as the third, and a little 

 longer than the second. Pronotum much as in N. coenosulus. Length ^ 3^, 

 ¥ 3i— 4 mm- 



Hab. Hawaii, Kilauea, among the lichen on the trunks of fallen Nani polymorpha 

 and Acacia koa (April, Kirkaldy) ; Kaumana, above Hilo, 2000 ft. (Jan., Perkins, 

 no. 679). — Maui, Haleakala, 5000 — 9000 ft. (March, Apr., Perkins). Dr Perkins tells 

 me he has taken it from various fruits, Mynah-bird's dung etc. This species is possibly 

 not endemic. 



It is variable, but I cannot find structural differences. In a Mauian female, the 

 tibiae are more testaceous and the apical angle is almost entirely pale. In one male, 

 the hind margins of the pleura are paler, but much more material is necessary for 

 comparison, before elevating the following varieties to possible specific rank. 



