Psyllid sp.
This is a bug in the family Psyllidae, known as jumping plant lice. Plant lice are often host-specific, meaning each species feeds on one or a small group of plant species.
Order: Hemiptera
Family: Psyllidae
Photograph: © 2020 RKD Peterson
Date of Photograph: 15 August 2020
Location: Montana, Gallatin Co. (45o20'53" N 111o10'31" W)