Perry's Index to the Aesopica
Perry reserves 452 for a long story about the the wolf and the donkey
on trial, reported in the Progymnasmata of an anonymous Byzantine
rhetorician (published in Walz, Rhet. Gr. I 597 ff.).
You can find a compilation of Perry's index to the Aesopica in the gigantic appendix to his
edition of Babrius and Phaedrus for the Loeb Classical Library
(Harvard University Press: Cambridge, 1965). This book is an absolute must for anyone interested
in the Aesopic fable tradition. Invaluable.