Last night I tried flushing out insects by adding an ounce of Dawn detergent to bucket of water and poured it on my lawn. It was amazing. In 30 seconds these huge brown caterpillars came crawling to the surface, wiggling around. There were also smaller green caterpillars higher up on the grass, same as I found last week. The smaller ones did not seem to be much affected by the soap suds. I am thinking they are the same species, but younger version--but I am not sure. Are they armyworms? What do you think? I will now try to post the pictures. Thank you.