Correction... My dog found these and barked and ran away from them. Vicious puppy. Are these Cicadas possibly? Will they destroy my lawn????
Found many of these in the lawn
These are indeed mature nymphs of a periodical (13/17-year) cicada; Magicicada sp. - see http://www.cicadamania.com/pictures/main.php?g2_view=core.DownloadItem&g2_itemId=5642&g2_serialNumber=1 for an image. They will not damage your lawn, but the adult females can damage small trees when they insert their eggs under the tender bark of small branches - see http://bugoftheweek.com/blog/2013/6/4/brood-ii-up-in-maryland-imagicicadai-spp