This image is reblogged from this 14 January 2014 post at Infernal Wonders. At the time, it was the subject of provenance research by Bacchus at ErosBlog. Here is what he found:

The signature on this piece identifies it as the work of Lucius Wolcott Hitchcock. This page identifies Hitchcock as a prominent magazine illustrator and provides the image title “Back There in the Grass” as drawn for the December 16, 1911 Collier’s.

Seems like pretty racy stuff for 1911!