( 109 ) 



Stomonaxus convexior sp. uov. 



Sf. niger, nitidns ; palpis, antennis, pedibusqne rafo-testaceis ; labro loiigitndine 

 vix lat-iore, fronte utrinqne prot'nnde late sulcata, sulcis loog'is, oljliquis ; protliorace 

 sulco mediano profnndo, snlcis intermediis profundis, longis, nsqne trans disci 

 medinin ascendentibus, lateribiis late marg'iuatis, aeqiiabiliter rotnndatis ; clytris 

 couvexis, rotnndatis, latitudine vix longioribns, striis ])rofnudis obsolete pnnctatis, 

 interstitiis laevibns fortiter couvexis ; abdomine rugulos()-j)unctato, segmento nltimo 

 lateraliter panc^is jmuotis instrncto ; tibiis aiiticis extns bideutatis, (S) tarsornm 

 auticornm articnlis extns triangulariter dilatatis. 



Long. 6 mm., elytr. 3^, lat. '.'f. 



Upper lip pitchy brown, a little liroader than long, rectangular. Median joints 

 of the antennae darker than the remaining ones. The onter border of the broad and 

 deep frontal grooves forms a conspicuous raised line, which extends beyond the end 

 of the groove ; the grooves are broadest behind, and rather oblique. Prothorax twice 

 as broad as the head, much broader than long; median groove scarcely abbreviated 

 in front, broad and deep, especially its middle part ; lateral sulci also broad. Stripes 

 of the elytra very dee]), and the smooth interstices strongly convex. Prosternal 

 process with a reniform impression. Punctuation of the abdomen rather dense and 

 ^omewliat rugulose, except in the miildlc of the segments ; the ultimate segment 

 with some punctures only at the sides. 



//nil. Sumbawa CW. Dohei'ty). 



Stomonaxus similis sp. nov. 



Sf. niger, nitidns ; ore, antennis pedibnsijue rufis, palpis panl<i pallidioribus. 

 Frons utrinqne sulcata, sulcis arcuntis, linea miunta ab sulcis ad oculoi-nm luarginem 

 posticum desceudente ; oculi prominuli. Protliorax latitudine fere dupilo longior, 

 ca]iite (cum oculis) dimidio latior, lateribus rotnndatis, augnlis anticis subrotundatis, 

 posticis valde obliquis, in dentem parvum prodnctis, linea mediaua augustissima 

 post medium minime dilatata, sulcis intermediis brevibus, angustis, sulcis mar- 

 ginalibus angustis. Elytra lateribus subjjarallelis, hnmeris apiceqne rotnndatis, 

 striata, striis leviter pnnctatis, interstitiis subconvexis. Metasternum et abdommi 

 lateribus fortiter punctata, segmento ultimo omaino jiunctato. Tibiae anticac extns 

 sexdenticulatae, ( S ) tars<inim anticorum articuli primi secnndiqnc vaide triinignJariter 

 dilatati. 



Long. mm., elytr. 4, lat. 3. 



Similar to St. minor sp. uov., but difl'ers in the larger size, in the shape of the 

 frontal grooves, in the more prominent eyes, in the prothorax being proportionally 

 broader and laterally more rounded, with the discal grooves a little longer; the fore 

 tibiae have six or seven small teeth at the outer edges, the upper ones of which are 

 placed towards the back of the tibia, and the apex is more dilated than in St. minor ; 

 the joints of the anterior tarsi of the male are more triangular ; the last segment of 

 the abdomen is punctuated nearly all over, and tlie prosternum is not pnni-tured in 

 front of the coxal cavities. 



St. stricticollis Dej. is another allied sjiecies, but its colour is nmch more rufous 

 or brown, the median line of the prothorax is broader, the sides of the elytra are 

 less j)arallel, and the interstices of the elytral stripes less convex, 



//«/,. P.uru (W. l)..lierty). 



