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Its modern name is ' katepimeron'.

It is not in the glossary. It is a more or less horizontal strip above the meron, so in front of the posterior spiracle. It is much smaller than the meron.

This is the meron
http://www.diptera.info/infusions/terms/terms.php?sortby=M&items_per_page=20&show_syn=1&cat_id=6

Hope this helps


Theo