Unless one wants to study the wing symmetry, and provided sample sizes are large,
it is not mandatory to dissect the wing from the specimen …

Genus Rhodnius

W1 is frequently absent because of a rough dissection.
W4, W5 and W7 may be not visible on a mounted wing.
The remaining points are fairly constant.
W8 is the corium-membrane junction at the external limit of the wing.
W9 is the posterior top of the wing.
W12 is obtained at the internal limit of the wing by tracing mentally
the perpendicular to the line joining W1 and W9.
W14 is the “coaptor”.


Genus Triatoma

W9 on pinned insects could be problematic because of some curvature
due to drying.

W4, W5 and W7 are much more persistent than in the Rhodnius genus:
they can be seen on mounted wings also.