Round 367
After Wavelette is on the ground, the beetles come back up, only to be bitten with AoO (no appreciable effect) and breathed on again. They avoid most of the blast (rolled 19 Ref save), but still take 10 points of electrical damage. Wavelette can breathe again in round 371. The beetles have 6 HP remaining.
The beetles crawl all over Wavelette, biting for 8 + 3 acid damage. Wavelette feels fine (17 Fort save), and is down to 75 HP.
Round 371
After flying around for a bit, Wavelette lands and breathes on emerging beetles. They take 13 points of electrical damage (natural 20 Ref save) and are dispersed. Wavelette can breathe again in round 373.
A human sized, pearlescent gray dragon trots into the arena to 60N80E and breathes a wave of force. Wavelette dodges (23 Ref save), taking 13 points of force damage. Wavelette has 62 HP remaining.