Eusebius’ Commentary on the Psalms is a massive work: my single spaced PDF fills over 500 pages of Greek text. It contains commentary, abbreviated and full, for the first 118 Psalms. Apparently, we have the full commentary for Psalms 51-95.3. The work also has several chunks of text that deal with the Psalms in general. These occur in the beginning of Migne’s edition. There is also a section between the 81 and 82 Psalms which discusses the Psalms ascribed to Asaph.

So, an outline of the work, as we have it from Migne, might look like this: (Where I’ve translated, I’ll fill in hyperlinks)

    Overview. These are general bits.

  • Eusebius on the Inscriptions of the Psalms. Some Abbreviated Teaching. Here he talks about the different kinds of psalms, according to their inscriptions (A Psalm, a Psalm of the Ode, and Ode of the Psalm, etc.)
  • A Hypothesis of Eusebius Pamphilli. This section discusses the authorship and divisions of the Psalms.
  • The Hypotheses of Eusebius on the Psalms. This section contains short thematic statements for each of the Psalms. Part 1
  • Eusebius on the Psalms. This is a longer extract which covers much of the same material as the other sections in the overview, but it goes into more detail. It discusses the origin of the Psalms, the authors, and several other topics. Part 1, Part 2
  • Eusebius of Caesarea on the Interlude. This is the last introductory bit, and it gives Eusebius’ explanation of how the “interludes” came about in the Psalms. Interlude translates the Greek work διαψαλμα, which translates the Hebrew Selah.

  • Psalms 1-71
  • On The Inscriptions of the Psalms Ascribed to Asaph
  • Psalms 72-118