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Theatre historians are fairly certain that Aristotle composed a treatise on comedy that has been lost. We think so largely because his Poetics begins with a distinction between different types of performance poetry. "Epic poetry and Tragedy, Comedy also and Dithyrambic poetry, and the music of the flute and of the lyre" are all mentioned and differentiated, but we only have in-depth analysis of tragedy with a bit of epic poetry thrown in. ^1
We know that most of Aristotle's work was lost because we have catalogs of his work from later authors. The most useful is Diogenes Laertius' catalog at the end of his life of Aristotle--the other two are either Byzantine (Hesychius' catalog at the end of his life of Aristotle) or are only in Arabic translation (Ptolemy's catalog). Both the other catalogs are fragmentary, but Diogenes' is complete. Diogenes' list contains well over 100 titles (more like 150). But the titles of Aristotle's works don't tell us everything--some of these works were only one book, but others were in as many as 25 books, and Diogenes includes Aristotle's treatises on the constitutions of 158 cities as all a single work, even though each of these must have been around the length of a single philosophical book.
Lawrence Principe's History of Science: Antiquity to 1700 speculated on this. He brings up a good point that hand-written copying of texts causes a bias in what is preserved. Knowledge on a subject that requires illustrations tends to disappear into the memory hole. John Q. Monk in the scriptorium will copy out text all day, and maybe include trigonometry pictures that he does not understand, but may have direct application for (and demand by) moneyed building or military interests. A text on human physiology or biology would have huge, time consuming drawings or wood prints. How good would one expect the copy of a copy of a copy of a copy to be for animals that aren't native to that monk's region? In humanity's defense, Wikipedia shows lots more surviving knowledge from Aristotle on these subjects that I expected.
The Constitution of the Corinthians is one of the missing works. Corinth is not a city about which much was written from the classical or Hellenistic time, but it is thought Aristotle gave an account of the political arrangements, in the same way as he did for Athens, but it does not survive. I can't remember where is it mentioned in ancient texts, and my google fu has failed me, but I can give Simon Hornblower as a source: The Greek World 479-323BC.