This is a very comprehensive & thorough review of Blumenschein's work.
Although it is not a "Catologue Raisone" , it is probably as close as you are going to get. It covers much information besides his Southwest period, which is very interesting. If you like Blumenschein's work, this is a must have.

Illustrated with vintage black-and-white photographs as well as copious full-color artwork, In Contemporary Rhythm: The Art of Ernest L. Blumenschein collects the work of one of the founders of the Taos Society of Artists, Ernest L. Blumenschein (1874-1960). In Contemporary Rhythm not only showcases Blumenschein's critically acclaimed work, but also contemplates the history and inspiration behind his creations in the exhaustively in-depth text. A welcome addition to public library as well as private artbook collections.