Extraterrestrials, Descriptive Information - Links to a few various reports on alien types.

Malta UFO Research (Mufor) - Alien Descriptions.

Siriusly at dudeman.net Alien Types - This dude claims to have gotten this information from Rutger's University, but sites a dead link. That's way interesting.

ReptilianAgend.com Varieties of Alien Beings - David Icke's descriptions from his Reptilian Research Archives.

Various kinds of Star Visitors - Dr. Boylan's descriptions, and pictures.

Google Search: Alien Types - Always check for the latest.