amusive

Illusive, deceitful.

[T]he Swain […] amaz'd / Beholds th' amusive Arch before him fly, / Then vanish quite away.

Giving entertainment or interest; recreative, diverting, engaging.

As I have regarded these amusive birds with no small attention, if I should advance something new and peculiar with respect to them, and different from all other birds, I might perhaps be credited, especially as my assertion is the result of many years' exact observation.

Amusing, humorous.