Thanks to both Marks for your input.
I neglected to mention that I had already uninstalled/ reinstalled the 3800, as well as confirming that driver 9.33 is still current, even with Mojave.
And no, the driver wasn't replaced with AirPrint.
Any other suggestions? - I'm stumped!
The screen shot below is what I now see in the print settings section of the printer... dialog.
What has happened to all of the other options normally present???
While perusing both the Adobe Photoshop and Apple forums recently for an opinion on a specific topic, I noticed a rather large volume of complaints concerning Mojave and how it has somehow "broken" various apps etc. Of course I cannot necessarily connect your issue with Mojave, but the coincidence would seem somewhat suspicious I believe. I always install a new OS on a Boot-Clone drive to test all apps before installing it on my Main Work Drive. All of which is moot in your situation of course, but perhaps a backup strategy you might want to pursue in the future. I would try installing the driver again, but only after you have
completely trashed the current driver. In case you are perhaps not familiar with the uninstall procedure for Epson drivers, you can probably download the "uninstaller" from the same site on which you downloaded the driver. I've never used the Epson uninstaller, but you can at least give it a try. Otherwise, use the following procedure:
1. Go to Sys Prefs > Printers & Scanners and delete the 3800 driver.
2. Go to the Mac HD library > Printers and trash the Epson folder and empty the trash.
NOTE -- if you have any other Epson printers they will also be deleted, so you would need
to reinstall them as well.
3. Go back to Sys Prefs and make sure the 3800 driver is not there. Also check the Library folder and make sure the Epson Folder is not there.
4. In Disk Utility - select the Mac Hd and run "First Aid" and then Restart the Mac.
5. Install the 3800 driver again and test it.
In lieu of using the Epson uninstaller, this is Epson's preferred method of trashing a printer driver. I always use this manual method for trashing a driver.
Gary