Giant aphids

6597.      On our spruce tree. Bald-faced hornets are swarming all around the area as well ?? Maberly, Ontario. Canada

Number 6597. These are giant aphids (Hemiptera/Sternorrhyncha: Aphididae; subfamily Lachninae). The wasps likely were attracted by the sweet substance (honeydew) secreted by the aphids. Click here for more detailed information