If we substitute for a frog a "Mr. Goodwill" or a "Mr. Prudence," and for the scorpion "Mr. Treachery" or "Mr. Two-Face," and make the river any river and substitute for "We're both Arabs . . ." "We're both men . ." we turn the fable [which illustrates human tendencies by using animals as illustrative examples] into an allegory [a narrative in which each character and action has symbolic meaning]. On the other hand, if we turn the frog into a father and the scorpion into a son (boatman and passenger) and we have the son say "We're both sons of God, aren't we?", then we have a parable (if a rather cynical one) about the wickedness of human nature and the sin of parricide. (22)
If you can't find many articles on your topic, you may want to try a periodical index which focuses on a specific academic field. Academic libraries often subscribe to this kind of subject index . One subject index that is particularly useful for finding literary criticism is the Modern Language Association's MLA International Bibliography , which includes scholarly writings on literature, languages, linguistics, and folklore. Ask your librarian to help you find a library near you where you can use this index, or to suggest other indexes that may be useful to you.