I took pictures of an insect that I found in plants in my office last
Fall,
and I was going to post them in this newsgroup to see if someone could id
them, but I'm not able to post them, getting the error message that I
can't
post binaries to non-binary newsgroup.

what is the easy solution?

Post it to the gardening binaries group, alt.binaries.pictures.gardens with
a sensible subject (like this one), then come back to the group and tell us
you've posted it.

James