56 Dr. F. B. White on new Species 



^ minore ; bucculis guise fere sequilongis, antice altis, retror- 

 sum cito humilioribus, pone gulam concurrentibus ; pronoto rude 

 et dense punctato, ruga transversa et ruga longitudinali fere 

 obsoleta subimpunctatis, angulis posticis lasvigatis, longitudine 

 latitudine postica ^ minore, lateribus fere rectis ; scutello dense 

 et rude punctato fortiter triradiatim rugoso-calloso, ruga longi- 

 tudinali laevigata ; hemelytris dense subtilius rugoso-punctulatis, 

 sutura clavi biseriatim punctata, margine costali fere a basi sen- 

 sim rotundato et subampliato ; pedibus crassis ; mesosterno sul- 

 cato, postice marginato ; ventre segmento quarto postice truncato, 

 segmento quinto obtuse emarginato longitudine media longitu- 

 dinis lateralis parti quartae sequilonga. 

 cJ et 2 . Long. 4J-6, lat. 1^-2 m. m. 



Near the " Lake of Fire " on Mauna Loa, Hawaii, at an 

 altitude of 4000 feet. 



34. Nysius vulcan^ n. sp. 



N. praecedenti {Niisio pteridieolix) persimilis, difFerre videtur pronoto 

 remotius punctato, margine costali dilatato corii paullo ampliore, 

 bucculis magis abrupte et minus sensim retrorsum humilioribus, 

 antennarum articulo secundo tertio vix longiore, et praecipue 

 ventris segmento quarto postice angulariter sinuato haud trun- 

 cato. 



{J . Long. 5|^, lat. If m. m. 



Mauna Loa, Hawaii. 



Very like Nysius pteridicola (no. 33) in coloration and 

 general appearance; but the different form of the fourth ven- 

 tral segment, as well as the other points noted, will serve to 

 separate them. The coloration of the underside differs in a 

 few particulars ; but having seen one specimen only, I cannot 

 be sure whether this will afford a constant cliaracter. 



The Hawaiian Islands seem to be very rich in species of 

 Nysius^ no less than ten species (all peculiar) having been 

 found there ; and of these Mr. Blackburn has discovered nine. 

 When there is reason to believe that the total number of 

 species occurring in the islands is (comparatively) completely 

 known, it will be desirable to give an analytical table of 

 them ; in the meantime I have been obliged to describe each 

 at some length, as the species of this genus are often very 

 similar in general appearance. 



Nysius must, froui its wide distribution, and especially from 

 the occurrence of species in many oceanic islands, be a genus 

 of great antiquity. 



35. Cymus calvus, n. sp. 



C. niger opacus, tylo apice, tuberculis antenniferis, collo loboque 

 postico pronoti, scutello apice, oculis ocellisque, prostethio margi- 



