of Hetero])terous Hemijptera. 53 



been confined to Australia or its more immediate vicinity. 

 Of the five species previously described, two belong to Austra- 

 lia, one to New Caledonia and Woodlark, one to the Fiji 

 Islands, and one to Amboina and Ceram. The Hawaiian 

 Islands seem to have derived the progenitors of their Hemi- 

 pterous fauna from all quarters ; but our knowledge is yet too 

 incomplete to allow of any speculation as to the direction 

 whence the immigration has been strongest. 



This species is intermediate between the sections "a" and 

 " a a " (having some of the characters of both), into which Stil 

 divided the genus in the ' Enumeratio.' 



Lygaeidae. 



29. Nysius Blackhurniy n. sp. 



N. oblongo-obovatus, niger, subnitidus, capite maculis oblongis 

 magijis 3 inter oculos, tylo liuea longitudinali, pronoto macula 

 parva ad margiuem anticum et disco postico pro magna parte, 

 clavo maculis parvis, corio maculis majusculis praecijiue prope 

 margiuem costalem sitis, necnon femoribus apicibus plus minus 

 rutb-testaceis, membrana albida fusco-maculata. Capite pilosulo 

 subtiliter punctulato ; anteunis rostro brevioribus, articulo 

 secundo quam tertius multo longiore ; rostro coxas posticas attiu- 

 gente, articulo primo bucculis suba;quilongo ; gula basin capitis 

 subattingeute ; bucculis gula paullo brevioribus, subparallelis, 

 retrorsum sensim humilioribus ; pronoto rude puuctato, rugis sub- 

 elevatis (una centrali longitudinali, altera transversa et ante 

 medium sita) subimpunctatis, angulis posticis elevatis laevigatis, 

 longitudine latitudine postica \ minore, lateribus ad medium paullo 

 sinuatis ; scutello triradiatim calloso-rugoso punctato (ruga ad 

 medium excepta) ; hemelytris pilosulis baud profunde punctato- 

 rugulosis, corii margiuis costalis parte quarta basali recta, delude 

 sensim rotundato-ampliatis ; pedibus mediocribus ; mesosterno 

 sulcato, prostethio autice puuctato ; ventre capillis adpressis 

 pallidis vestito. 



5 . Long. 4, lat. Ig m. m. 



Taken by sweeping ferns near the " Lake of Fire " on 

 Mauna Loa, Hawaii, at an elevation of 4000 feet. 



30. Nysius nitidus^ n. sp. 



N. elongatus, nitidus, glaber, pallide olivaceo-brunueus, subtus cum 

 pedibus dilutior, capite capillis adpressis aureis vestito, brunneo, 

 tylo, linea longitudinali, orbitulis et tuberculis antenniferis ochra- 

 ceis, antenuis et rostro apice brunneis, his articulo primo (macula 

 interiore excepta), articuiis secundo tertioque ochraeeis, articuhs 

 secundo tertioque ad medium brunnesccnti-aniuilatis ; pronoto 

 puncturis, angulis posticis et maciJa ad medium margiuis postici, 



