In the resource mentioned in the subject, there's a table of contents that helps us navigate the bjillion entries. There's a popout for each letter of the Greek alphabet, but chi is subsumed under phi. (It's the only letter that does not get its own popout.) This seems to reflect the actual text because all the other letters have a heading for that particular letter, but poor old chi does not, hence, there's not a popout for it. I find it a little odd on Brill's part, but since I don't have a hard copy of the volume, it also makes me wonder if this was somehow missed in data entry on FL's part.
It's not a big deal, but I did spend a moment trying to find a word that starts with chi. 
Can anyone offer a definitive statement about this?
Thanks!
Lew