Hembra
Oscarinus rusicola (Small Dung Beetles). Photographed at High Park, Toronto, Ontario on 15 July 2020.
Coleoptera (Beetles) » Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles) » Scarabaeoidea (Scarab, Stag and Bess Beetles) » Scarabaeidae (Scarab Beetles) » Aphodiinae (Aphodiine Dung Beetles) » Aphodiini » Aphodius » Aphodius Subgenus Oscarinus (Subgenus Oscarinus) » Aphodius rusicola (Aphodius (Oscarinus) rusicola)
The hitchhikers were actively crawling around on the surface of this small (4.6 mm) dung beetle, Aphodius rusicola. At a mercury vapor lamp, suburban NJ. They are apparently phoretic mites (using the beetle as transportation but not feeding on it), perhaps Macrochelidae.