Cryptocephalus bicostatus Suffrian, 1866  

Murky yellow body; ends of antennae, black; the pronotum flat as glass; the puncture-stripes coarse in front, the upper ones almost invisible starting in the middle, the fifth and seventh wear off even earlier; flat and glossy interspaces, the front end of the fourth, which curves inwards, and the front half of the eighth, distended in front into horns. [Translated from the original German in Suffrian, 1866].