Seychelles and llangoon. 11 



siibtus piceo, pedibus piceis vel fusco-testaceis, antennarum clavis 

 fuscis. 

 Long. Corp. 1*0 mm. 



Ratlier shortly and broadly oval, with thorax forming 

 almost a perfect semicircle (not a narrowing' curve), and 

 elytra considerably wider than the thorax, reaching their 

 videst point a little before the middle ; shining and entirely 

 glabrous above. Colour : pitchy black ; front margin of the 

 thorax broadly pale testaceous and translucent ; each elytron 

 lias a median pale spot, narrowly separated from its neigh- 

 bour at the suture, more widely separated from the outer 

 margin ; in one specimen the spots are clear yellow, in others 

 darker, reddish, and suffused ; the black ground-colour is 

 slightly diluted at the apices of the elytra ; underside pitchy; 

 leos pitchy or fusco-testaceuus, with paler tibiaj ; head and 

 clubs of antennJB dark. Thorax, and elytra moderately 

 strongly and closely punctured ; lateral margins of elytra 

 reflexed throughout the greater part of their length, visible 

 from directly above ; sutural stria present, vanishing in the 

 anterior portion. Wings apparently ample, but iiot dissected 

 out. .y('ias(^r>ium and abdomen with remote punctures 

 bearing fine short hairs, the former nearly impunctate in the 

 middle. 



Prosternum in front of each coxa forming a bridge of con- 

 siderable breadth in an antero-])osterior direction, and having 

 an elevated median longitudinal keel, i. e. approaching the 

 condition found in Sacium grosi,inianum [cf. fig. 6). The 

 balsam-preparation of the mouth-parts shows that the medium 

 (tig. b) is rather narrow and bluntly pointed in front, the 

 apteal joints of the labial palpi shorter than the second (con- 

 trast 6'. picaultianum), and the penultimate (third) joints 

 of the maxillary palpi proportionately longer than in some 

 other species. 



Sacium concinnum, Matth. (Ceylon), S. formosum, Matth. 

 (Ceylon), and S. poUtum, Matth. (Japan) [Mon. pp. 52, 56, 

 57], all have the same general scheme of colour — each elytron 

 with a single, pale mark on a dark ground. S. roslanianum 

 is. however, quite distinct from them all. S. concinmim is 

 differently shaped, having the el} tra very little wider than 

 the thorax, its punctuation is much closer, and the liglit 

 marks on the elytra are more longitudinal in direction and 

 much more widely separated from the outer margins and 

 from one another. IS. formosum is larger, longer, and 

 narrower, with thorax forming a longer narrowing curve; 

 also its thorax is reddish instead of black, and the pale marks 

 lie farther back on the elytra and are much more widely 



