Damn, I'm sorry to hear about the turn of events with your last female bolivari. I would hope that restricting the total ventilation of her enclosure by covering the vent holes on the lid for just a few days would not lead to the demise of that female.
As I mentioned before I am also interested in keeping this species. P. bolivari does appear to be a picky species to keep alive. Adequate ventilation & humidity, the size of the enclosure and providing numerous hides/shelters seem to be very important factors in keeping and breeding P. bolivari and several of the other Spanish isopod species.
If you haven't already looked at the "Albums" section of Edulio Isopods Facebook page you should check it out.
This info is from that site:
Our "small" cages: 40X24X!6 Cm. with a wire mesh of 16X10 Cm. on the center of the top.
We use them for small species and for selective breeding purposes.
Our "big" cages: 73X40X16 Cm. with a wire mesh of 26X20 Cm. on a side of the top.
We use them for our main colonies.
Based on what I'm seeing on the Edulio site I will have to set up much larger enclosures for several of the Spanish species than what I had originally planned on.