Seychelles and Ihingoon, 11 



siibtus piceo, pcdibus piccis vel fusco-teotaceis, antennarum clavis 

 fuscis. 

 Long. Corp. 1*0 mm. 



Rather sliortly and broadly oval, with thorax forming 

 alino-st a perfect semicircle (not a narrowing curve), and 

 el)tra considerably Avider than the thorax, reaching- their 

 widest ])oint a little before the middle ; shining and entirely 

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

 tlioiax broadl}-- pale testaceous and translucent ; each elytron 

 has 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 otliers 

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

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

 legs ])itchy or fusco-testaceous, with paler tilna; ; head and 

 clubs of antenuEB dark, Tliorax and ehjtra 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 a})parently ample, but not dissected 

 out. ]\Jeiasternum and abdomen with remote punctures 

 bearing fine short hairs, the former nearly impunctate in the 

 middle. 



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

 siderable breadth in an antero-posterior direction, and having 

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

 condition found in Sac'mm grossinianum {cf. tig. 6). The 

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

 (tig. 8) is rather narrow and bluntly pointed in front, the 

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

 trast h. picaultianuni) , and the penultimate (third) joints 

 of the moxillary palpi proportionately longer than in some 

 other s])ecies. 



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

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

 57], all liave the ?ame general scheme of colour — each elytron 

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

 isj however, quite distinct from them all. S. concinmini is 

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

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

 marks on the elytra are more longitudinal in direction and 

 much more widely separated from tlie outer maigins and 

 from one another. S. formosuin k larger, longer, and 

 narrower, with thorax forming a longer nairowing curve; 

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

 lie further back on the elytra and are much more widely 



