I was reviewing images and marking some for movement. This image was one marked and erroneously moved.

I thought this was already settled back in 2006 that this is indeed T. linnei?? The extreme bow in the costal margin is apparent in this specimen.

I also did the wing bisect experiment on this image as previously discussed in other images on bugguide. Click here and it bisects the last marginal cell nearly in half when following the angle of the medial vein.

I was reviewing images and marking some for movement. This image was one marked and erroneously moved.

To Genus page for now.....

to Tibicen chloromera guide page

"if you look closely at this specimen compared to canicularis, you will see that there is a difference in the shape of the front forewing. Notice the extreme curvature of the costal margin in this specimen? This is the only true identifying factor for T. linnei. No other cicada specimen in the United states has this extreme curvature."
We'll move it there while we wait for any other thoughts.

Please refer to the follwing paper for discussion on the idenification of T. linnei and separation of this species from other related species.

http://entnemdept.ufl.edu/walker/buzz/c700lb28.pdf
See page 226 for bend discussion!

According to Beamer and supported in other manuscripts, the shape of the opercula of the males in T. linnei is the ONLY true deciding factor, not the wing shape. I have had this discussion with several leading cicada specialists and none of them weigh heavily on the costal margin diagnosis any longer for identification of linnei or separation of it from similar related types.

Bowing in the costae and use of the "line bisection test" for species determination can fail. There is significant overlap in this trait and strong bowing in the costae can be seen in any of the following taxa: T. linnei, T. pruinosus, T. winnemana and T. canicularis (to a lesser extent T. robinsonianus). Due to overlap, it is not possible to separate the species based on this character alone!

any ideas which species this could be?

I vote for this species being T. pruinosa. The orange lining to the "MacDonald's arches" on the mesonotum are characteristic of the pruinosa in the Central Mississippi area. It is definitely not T. chloromera, which has a much larger mesonotum that is mostly black.

i am no stranger to IL populations of T.linnei and pruinosus. Both overlap in traits and calls. most T.linnei look like pruinosus in the central parts as well as some in the north.