Today the insects were processed from the trap run. Without a microscope and references (the joy of a cross country move) I cannot identify much, but here are the highlights:
Sphaeridium lunatum is a really cool dung beetle because it is not a scarab, it is a hydrophilid. When I first started paying attention to dung beetles I caught a bunch of Sphaeridium and proceeded to run through every scarab key I could find. After a couple of weeks of frustration, I went to Boring and Too Long and got the right family – then it was easy. This species is non-native.
Onthophagus hecate is a very cool beetle. I love the hood scoop on the pronotum. With a microscope, the distinctive pronotal microsculpture could also be shown. This species is native and I like to think about them following the buffalo across the plains…
Geotrupes blackburnii is another native dung beetle. It is very large. This identification is tentative because I will need a microscope and my copy of Howdens 1964 Geotrupinae of North and Central America.
Both the Geotrupes and Sphaeridium I should probably not call dung beetles, because the are not traditionally thought of as such. The sure show up in a bunch of poop traps though.