On a random search for some of my online references, I came across this page from the EHP journal which has (one screen up from the bottom of the page) a picture I snapped here in the lab and sent to somebody, I guess, ’cause there it is. The blurb mentions “two California museums” which, for the record, were the Oakland Museum of California, and the Getty Conservation Institute (their research publication on the use of Inert Gases in the Control of Museum Insect Pests is now available free as a PDF for download).