different between mephitic vs mephitically

English

From Latin mephiticus, from mefitis, mephitis: compare French méphitique.

mephitic (comparative more mephitic, superlative most mephitic)

From mephitical + -ly.

mephitically (comparative more mephitically, superlative most mephitically)

In a mephitic manner.
- 1971, Brian Lumley, ‘Rising with Surtsey’:
  There was a hissing sound, almost drowned out by the creature's single shrill scream of agony, and a small cloud of steam rose mephitically from the thing's face as it pitched to the floor.

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