Tacua speciosa is a very large Southeast Asian species of cicada. It is the only member of the genus Tacua (from ) and is the type genus of the tribe Tacuini.
Tacua speciosa has a wingspan of and a head-body length of . Megapomponia, Pomponia and Tacua are the largest cicadas in the world. Tacua speciosa has black wings, a yellow-green collar, a red transverse stripe on the thorax and a turquoise-blue abdomen.
This species can be found in Borneo, Sumatra, Java, Singapore, Malay Peninsula. It was once described as from North East India but it seems to be a mistake.