"Horia is a genus of beetles in the family Meloidae. They are placed in a tribe Horiini which includes two other genera Synhoria and Cissites.

Some species in the genus live in the brood colonies of Carpenters bees (Xylocopa bees). Horia maculata was introduced to Hawaii to control Xylocopa but the beetles did not establish a stable population."

Source: Wikipedia

Horia

Interesting as I have some Carpenters bees living in the garden!

ID with the help of stho (Flickr)