Allexperts Entomology - Entomologists available to answer questions about various insects, spiders and "mystery bugs." Includes archives of past answers.
Kendall Bioresearch - Guide to the classification and identification of insects and other arthropods, with biological notes and examples for all major groups.
MSU Bug Camp - Mississippi State University 4-H entomology program for kids of all ages. Features photographs of the events and collection details.
Pherobase - Extensive searchable database and references concerning insect pheromones and semiochemicals.
Public Health Entomology - Center that conducts research on mosquito control. Includes downloadable information guides on a number of insect species.
Systematic Entomology - Guide to online insect resources from North Carolina State University.
Systematic Entomology Laboratory - United States Department of Agriculture website that provides research, products and data on a wide variety insects.
Texas Entomology - Complied by Mike Quinn, this site features extensive links to general entomology and Lepidoptera-specific resources.