The distal lobe of the posterobasal portion of the axillary membrane that joins the hind margin of the wing to the thorax is called the upper calypter. It begins the membrane folds over then lower calypter. It is usually larger than the lower calypter, but in some groups, e.g. Tabanidae, Acroceridae, and many Calyptratae, the lower calypter is larger than the upper one.
Hi. Please delete all photos of E. carrapateira I've uploaded. I did not remember that I already had uploaded that species in particular. Except the pallidifacies (this was not present yet). Thank