by Carl Strang
The Kankakee Sands bioblitz gave me the opportunity to learn more about the straight-lanced meadow katydid. My only certain identification in northeast Illinois was a male in Kane County last year. I had photographed some females with long ovipositors, but most of these seemed better fits as short-winged meadow katydids. An open area at the Conrad Savanna State Nature Preserve proved to have an abundance of straight-lanced, and they were the only members of their genus (Conocephalus) in that location.
Mature females left no doubt.
Late-instar female nymphs likewise had exaggerated ovipositors.
Though I could hear the incessant buzzing, free of ticks typical of meadow katydid songs, that supposedly marks the straight-lanced song (using the SongFinder, of course), searching and sweep sampling produced just a single male, a nymph in the penultimate instar.
I was paying attention to femur color patterns as well. Note the diffuse blackish stripe on the male nymph. I think this will prove to be diagnostic, when present. It is lacking in the mature female in the first photo, however. From this experience I am inclined to regard body length rather than femur length as the measure the ovipositor needs to exceed on a mature female meadow katydid to be considered a straight-lanced. Going back through my photo records, I found only one that met this criterion.
This was one of the two highlights of my singing insect survey at the bioblitz. I’ll share the other in my next post.
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