In addition to checking whether the discal cell is darkened or hyaline, another clear way to distinguish tibialis from furcillata is to assess the color of the facial grooves (see "fg" in the labelled reference photo here). The facial grooves are black in tibialis and white in furcillata.

The facial grooves are often not visible in field photos but, fortunately, in this 2nd photo of the series, one can see a bit of the very dark color of the "upper" (i.e. distal) edge of interior of this conopines left facial groove (the lower/proximal portion of the its left facial groove...and all of the right facial groove...is blocked from view here by the outer edge of the right facial ridge...see "fr" in the aforementioned labelled reference photo).

This strongly reinforces the ID of tibialis here...but perhaps also makes it seem less liklihood that the the red of the frons is a result of this being teneral. [When Physocephala first emerge from their pupa, much of the body is red...as the emerged adult "cures" in the hours after emergence the mature colors set in. If the red of the frons were due to this being a teneral (i.e. recently emerged) individual, why wouldn't the dark area of the facial grooves also still be somewhat red?]

See this forum article a discussion of these unusual P. tibialis.

Moved from ID Request.