1d83ea69___Publications___UGA_Extension__Symptom_s__of_Damage
[Insect] Cereal leaf beetle [Description of insect] The adult is 3/16 inch long, with metallic bluish-black head and wing covers; legs and "neck" are orange. Larva is yellow to yellowish-brown, slug-like, but color obscured by dark fecal matter carried on their back. [Symptom(s) of Damage] 
Longitudinal slits chewed out from between leaf veins, usually at field edge.
Georgia Corn Diagnostic Guide | Publications | UGA Extension
Symptom(s) of Damage