How to tell Rhodobaenus tredecimpunctatus and R. quinquepunctatus apart...
Ironweed Curculio versus Cocklebur Weevil
from borisb
tip of elytra black (extent variable) = Rhodobaenus quinquepunctatus
tip red = Rhodobaenus tredecimpunctatus
"black tip" in quinquepunctatus may be reduced to margin, leaving a subapical spot isolated. This form is a look-alike.
https://www.inaturalist.org/observations/26708814
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