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Photo#704933
Pterostichus stygicus - male
Copyright © 2012 Brad Barnd

Pterostichus stygicus - Male
Marion County, Indiana, USA
September 12, 2012
Genitalia of male Pterostichus stygicus. Symmetrical apex, unlike the asymmetrical apex in the similar P. coracinus. Beetle taken under log in forested area.
Contributed by Brad Barnd on 17 September, 2012 - 2:24pm

Very nice instructive image of aedeagus.
Trouble with computer caused loss of my long reply here. Too frustrated, I won't try to repeat.
… Peter W. Messer, 20 September, 2012 - 4:24pm

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