18/8.] HEMIPTERA OF ST. HELENA. 473 



et abdomine subtus brunneo-nigris ; scutelli dimidio apicali tes- 

 taceo-flavido ; oculis ocettisque brunneis. 

 S ? . Long. 75-9, lat. 2|-3 m. m. 



Hab. in editoribus insulse, ad " Diana'sPeak" et " Halley's Mount." 



In addition to the differences of coloration, this species may be 



distinguished from the last by the internal sector of the elytra having 



three cells exteriorly between the base of the elytron and the apex of 



the clavus instead of two, as well as by the somewhat smaller stature. 



Nehela, gen. nov. 



Corpus cylindricum, elongatum. Caput obtusissimum, latum, thoraci 

 eequilatum, desuper visum brevissimum angulato-arcuatum ; ver- 

 tice magnam ad partem declivi ; facie dilatata, subtriangulari, 

 apice producto, lateribus ante oculos late sinuatis, dein leviter 

 rotundatis ; plica supraantennali valde obliqaa, oculos fere attin- 

 gente. Ocelli inter oculos in parte antrorsum vergente verticis 

 positi, ab oculis et inter se fere cequidistantes. Clypeus distincte 

 productus, sulco inter basin et frontis apicem haud instructus. 

 Pronotum transversum, sat longum, antice subangulato-rotundatum. 

 Scutellum mediocre, latius quam longius. Elytra apicem abdominis 

 superantia, pone clavum anguste marginata. Elytrorum alarumque 

 vence ut in Stonasla formates. Tibiae posticce spinosissimce. 



Genus Stonaslce valde affine, forma faciei, situ ocellorum, et 

 clypeo distinctius producto divergens. 



24. Nehela vulturina, sp. n. (Plate XXXI. fig. 6.) 



N. atra, opaca ; capitis vertice {maculis parvis 2 ad ocellos et 4 ad 

 marginem posticum exceptis), oculis, macula triangular i in medio 

 frontis, antennis et lateribus, pronoti marginibus lateralibus interne 

 angulatis, margine postico et maculis 2 parvis in disco (interdum 

 obsoletis), scutelli macula utrinque ad marginem ante apicem, 

 elytrorum {clavo excepto) lineolis longitudinalibus latis inter 

 venas, necnon marginibus antico interioreque corii, pedibus anticis 

 intermediisque (unguiculis exceptis), coxis posticis, femoribus po- 

 sticis ad apicem, tibiarum posticarum basi spinisque et articulis 2 

 primis tarsorum posticorum testaceo-brunneis. 



3 2 • Long. 7-7|, lat. 2-2| m. m. 



Hab. in excelsioribus insulse, ad " Diana's Peak" et "High Peak." 



Frequently the veins of the clavus are more or less brown ; and 

 more rarely the whole of the elytra is entirely black. 



Argaterma, gen. nov. 



Corpus oblongum, paullo depressum. Caput breve, pronoto paullo 

 breviore et latiore, margine antico acuto ; vertice inter oculos quam 

 singulusoculus duplo latiore, horizontali, concavo prcesertim antice, 

 margine antico arcuato, acuto, inter ocellos angustissime reflexo. 

 Ocelli in margine antico prope oculos positi. Fades convexa, 

 dilatata, subquddrata, apice obtusissime rotundato, lateribus 

 ante oculos sinuatis, dein leviter rotundatis ; suturafrontali ocellos 

 attingente. Pronotum transversum, antice arcuatum, inter oculos 



Proc. Zool. Soc— 1878, No. XXXI. 31 



