Second instar juvenile, Lake County, Illinois.

Photograph by Nancy Collins, http://www.oecanthinae.com/, used by permission.

At http://bugguide.net/node/view/536680 Nancy Collins has posted a series of photographs
showing the instar-by-instar development of a 2nd instar juvenile, collected 28Jun2011,
through its final molt to an adult male, on 27Jul2011.