New Genera and Species of Phytophaga. 357 
increasing in thickness from their base upwards ; basal joints very 
short, transverse, second and third nearly equal, each about one 
half as long again as the first; three following joints gradually de- 
creasing in length from the third, transverse; seventh nearly equal 
to the two preceding united, and conjointly with the four apical 
joints forming a narrowly-ovate club, the sutural lines between the 
four latter joints obsolete, the six basal joints pitchy-black. Thorax 
rather broader than long, sides nearly straight behind, rounded and 
narrowed in front; anterior angles armed with a subacute tooth ; 
subcylindrical above, transversely excavated on the hinder disc ; 
surface deeply and closely impressed with large punctures, rugose 
on the sides; basal lobe depressed.  Scutellum smooth, tri- 
angular, its apex broadly truncate. Elytra parallel, broader than 
the thorax, apex regularly rounded, margin narrowly dilated, 
serrate, sides indistinctly sinuate along their middle; each elytron 
with three strongly-raised coste, their interspaces deeply gemellate- 
punctate. 
