Did another bug drop into the cache with this Travel Bug listed in the inventory.
I noted on 8/14 on the cache page that I did not see any bugs in this cache on that date as well.
Might be time to mark this one as missing. I hope it turns up in the wild again someday soon.
Might suggest sending all cache loggers since April (when I noted seeing it there) and see if any might need a reminder that they picked it up. -- I don't often find this works but its an idea.