Bryan Arnett, character designer for the show, has again published previously unreleased character designs for “The Good Deed.” A quick scroll through the Production tag will take you to his previous sets. He comments:
Hefferumph (I think thats spelled correctly) and an Alien in tuxedo.
There we have the canonical spelling, in case you wanted to start an ask blog.
Update 2013-10-01: He has published another set of four pieces of concept art, including one model by Craig McCracken. I’ve added them above.