Insects with I

• Inchworm

  Real insect larva (geometer moth). Good fit!

• inch worm

  Same as inchworm; a real insect larva.

• inchworms

  Plural is fine; these are moth caterpillars.

• Inch Worm

  Same as inchworm; a real insect larva.

• Inch worms

  Plural is fine; common name for moth larvae.

• indigo beetle

  Real darkling beetle species, an actual insect

• Ichneumon wasp

The words in the list Insects with I come from players of the word game Categories game.