Subcostal cell: in Diptera (Schiner), = marginal cell (Loew), = radial 1 (Comst.
"Explanation of Terms Used in Entomology" by John. B. Smith
The last thoracic or subcostal nerves pass behind the external arcuate ligament.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
Below the last rib a subcostal artery runs.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6" by Various