Squash bugs are there and they have been there for at least a month now. Please check on the undersides of older leaves of your summer squash, winter squash, melons and Pumpkins. These pictures may help you.If you are growing these plants, they are there. They are closely related to two other pasts that kind of remind you of squash bugs; leaf footed plant bug that we see commonly on pomegranate and the common stink bug which can cause dimples in fruit and buds to abort on fruit trees.
Look at these older postings on my blog:
http://xtremehorticulture.blogspot.com/2011/04/q-every-year-my-zucchini-plants-are.html
http://xtremehorticulture.blogspot.com/2014/04/is-there-anything-that-will-control.html
http://xtremehorticulture.blogspot.com/2013/05/grey-colored-beetles-on-zucchini-most.html