I worked hastily in the following weeks to go through the considerable manuscript (371 folios) and check its content. More and more, albeit still provisionally, I have come to the conclusion that we have to do with a lot of lost homilies of Origen. My conviction is supported, among other things, by the exegetical treatment presented by the homilies, the doctrinal elements they preserve, the stylistic features which are typical of the great Alexandrian. In addition, some excerpts of these homilies were already known to us under his name in some catenae fragments edited in PG 17 and the Analecta Sacra of Pitra, especially with regard to Psalm 77.This seems to be a very important discovery. More please.
Only a thorough examination of the texts transmitted by the Codex Monacensis Graecus 314 will permit to extend with reasonable certainty the attribution to Origen of all the remaining homilies or of part of them, besides the Homilies I-IV on Psalm 36.
Background here (immediately preceding post).
UPDATE: Roger Pearse: Jerome’s Letter 33, listing the works of Origen.