Disholcaspis conalis Burnettweldia conalis, formerly Disholcaspis conalis, the witches' hat gall wasp, is a species of hymenopteran that induces stem galls on Oregon oaks in North America.

[1] The conical stem galls look like witches' hats lined up on a stick.

[1] The base of the detachable gall appears to grip the stem.

[1] Typical galls are 10 to 18 millimeters tall.

[2] The type species was collected in Sequoia National Park.