Boxelder bug nymphs

Boxelder bug nymphs

6066  Could you tell me what this is please. They are on the leaves and there are hundreds of them.  I live in Woodstock Ontario and this was taken this afternoon. Thanks. Linda

These are nymphs of a boxelder bug, likely eastern boxelder bugs, Boisea trivittata; (Hemiptera/Heteroptera: Rhopalidae). These can be nuisance pests when they occur in large numbers, but they seldom cause any real damage. See https://tinyurl.com/nrlf5m for more detailed information. Ed Saugstad, retired entomologist; Sinks Grove, WV.