USDA has resources for identifying bugs
The United States Department of Agriculture (USDA) has a number of resources for identifying bugs and pests, including weeds and plant diseases, by physical characteristics. Once a bug or pest is identified, users can find illustrations and expert information. Designed for USDA staff, the resources can be used by educators, environmental health professionals, gardeners, and others.
For more information, go to the USDA web site: http://1.usa.gov/19I1wLr