Half the apical circumference of the scape raised to form a rim or flange, each extremity of which forms an angular projection; pronotum with a deep pit on each side, separated by a flat, shining bridge and each filled below with a tuft of pubescence. (A spurious radialis encloses a long, very narrow, radial cell, (fig. 102); scape about one and a half times longer than flagellum 1)