Yes, O. lignaria are still active!

I captured these three images in quick succession of an O. lignaria coming out of a tunnel (5 holes in from the left, third row up from the bottom of the Binderboard) and sitting on the face of the Binderboard, presumably warming up before flying away.  The top and the bottom image also have an O. aglaia going into a tunnel (top image), or sitting on the face of the Binderboard (bottom image).  the middle image shows a second bee, probably another O. lignaria,apparently coming out 

 of the same tunnel as the first bee. 

Images were taken about 1pm, sunny day about 66oF.  I shifted the camera to the right between the first and second image.