May 16, 2017 1:44 pm
Found these crawling all over my house today. I live just south of Boston. There were tons of them, about a half inch long excluding antennae.
Signature: Hoping it’s harmless
Dear Hoping it’s harmless,
It is. This is a Small Winter Stonefly in the family Capniidae. According to BugGuide: “adults emerge from November to June (most common in winter and early spring).” Do you live near a stream? According to BugGuide: “nymphs beneath rocks and gravel on the bottom of streams and rivers; adults often seen on snow, or resting on concrete bridges over streams.” Since they are only found near very clean, well oxygenated water, their presence is a sign that the local water is not polluted.