Xenŏcles in Harpers Dictionary of Classical Antiquities (1898)
（Ξενοκλῆς). An Athenian tragic poet, ridiculed by Aristophanes, and yet the conqueror of Euripides on one occasion (B.C. 415). He was of dwarfish stature, and son of the tragic poet Carcinus. In the Peace, Aristophanes applies the term μηχανοδίφας to the family. From the scholiast it appears that Xenocles was celebrated for introducing stage machinery and spectacular effects, especially in the ascent or descent of his gods.
Xenocles in Wikipedia
Xenocles (Ξενοκλῆς) or Zenocles was an Ancient Greek tragedian.
There were two Athenian tragic poets of this name, one the grandfather of the other. No fragments of either are currently known, except for a few words of the elder apparently parodied in Aristophanes' "The Clouds".
Aristophanes called the elder Xenocles an execrable poet and was never tired of ridiculing him; describing, along with his father, Carcinus of Agrigentum, three brothers and a member of the third generation (also called Carcinus), "a whole potful of tragic crabs". He also wrote that "Xenocles, who is ugly, makes ugly poetry". In his play The Poet and the Women Aristophanes' chorus claims "Even this audience, I'm sure/Would find the man a crashing bore." which highlights his doubtful views on Xenocles as a writer. However, in 415 BC Xenocles gained the first prize with one of his trilogies when in competition with Euripides. But Aelian accounts for this by saying that "the jury were either intellectually incapable of a proper decision or else they were bribed."