While Jess was weeding in the cosmos bed, she found half–inch long beetles in the sandy soil around the roots of crabgrass and saved some for identification.
They are brown chafers. The grubs cause damage to turf and while adults will make a few holes in our vegetable leaves they are generally not a problem to our garden plants.
Thanks Jess for your bringing this to our attention. If you find an insect and want it identified, leave it in a jar in the shed and I will do my best to find out what it is and how to deal with it.
I will take an image tomorrow. In the meantime, Google brown chafer beetle for images.