This is a Leaf Beetle (Chrysomelidae) whose larval host is elm trees. The adults also feed upon the leaves of elm. It is seldom found very far from parks and towns where these trees have been planted. This is an introduced species, and is considered to be a pest on elms. The adults are 5-7mm long, and are found from February to October.
It can be distinguished from Trirhabda spp. by the hourglass shaped spot in the middle of the pronotum, the dark streaks on the elytra between the shoulders and scutellum, and a second spot on the head near the antennae.
https://bugguide.net/node/view/105144
https://en.m.wikipedia.org/wiki/Elm_leaf_beetle
https://faculty.ucr.edu/~legneref/biotact/ch-40.htm
Size- 5.4-7mm
Habitat- places with elm trees
Range- Region wide
Eats- Adults and larvae feed on elm leaves
Flight Season- February to October
