Thanks to everyone who replied (by Digest and by private email)
to my query on the Ostrich Riders.
No, I wasn't confusing them with the Bolo Lizard people. My copy
of Cults of Prax definitely says: "The minor tribes include the Bolo
Lizard people and the Ostritch (sic) Riders, a reptilian group."
<actually not a verbatim quote, I don't have the book at work, but
it's close enough>
However, I guess we can take this as an typo - it hardly calls into
question the integrity of the whole Glorantha mythos!
I am pursuing the Heroes article and will let you know if anything
gets off the ground (presumably not the Ostriches).
Richard Crawley
richardc_at_sypte.co.uk