272 GUY A. K. MARSHALL. 



6 (7). Prothorax much broader than long (10 : 15) ; elytra with a minute smooth 



granule at the anterior edge of each puncture . . subgranulatus, sp. n. 



7 (6). Prothorax nearly as long as broad (9 : 10) ; elytra without granules 



grenadensis, sp. n. 



8 (1). The whole of the head above the eyes evenly convex and smooth, with only 



a few scattered shallow punctures ; prothorax with a conspicuous raised 

 central costa . . . . . . . . . . . . costicollis, sp. m 



