Stem borer (Lepidoptera) in Andropogon

I observed larvae tunneling in shoots whose tips had died and turned brown. Several similarly damaged shoots from the same collection location contained cecidomyiid larvae (record 0051) and/or puparia of a chloropid fly (record 0052) instead of caterpillars. When held in a glass jar with 10cm-long cut sections of culm, the Lepidoptera larvae tunneled into these, feeding voraciously and generating copious quantities of frass in the culm interiors. Larvae were a pale tan color with a brown head capsule.