Hi, Since we've been pointing out which instar many of these are, I thought I'd add it here too, and this is a very good example. There is I think a good series of all instars of this species on BugGuide now. In the third instar (there are usually five) you can see the wing "pads", but they are small and still point downward. They are the two lobes on the side of the thorax, on the first two segments behind the pronotum or "saddle". They are the same segments to which the middle and hind legs are attached. On the next segment back (1st abdominal segment) you can see the small tympanum or "ear" right next to the wing - it is a dark spot. On the third instar the wings are distinct with veins starting to show though. In the 1st instar they are not really visible, and on the second they are little lobe with no obvious veining. By the 4th they flip upward to a different orientation. There series of photos for this species here as well, but the photos lack clarity of detail:
Pfadt's Fact Sheets

But how about this one