WebMD
Web Md: Lice
This article from WebMD provides a great, brief overview of lice, focusing on the three main kinds. Head lice, pubic lice and body lice, each of which come with a picture. Topics that are also covered include cause, symptoms, what...
Other
Frequently Asked Questions About Head Lice
This HeadLice.org site has several links to FAQ's about head lice and also its treatment.
US National Library of Medicine
Medline Plus: Head Lice
A short explanation of what head lice are. Includes links to comprehensive information regarding detection, symptoms, prevention, and treatment. This page is available in numerous languages.