Codex: Imps

Height: 2 to 4 feet tall.
Build: Spindly
Skin Tone: Red, orange, or rarely, purple.
Hair Color: Rusty, red, black, and rarely brown.
Eye Color:  Totally black with glowing red pupils.
Typical Dress: Naked save for a ragged loincloth and a collection of small belts and pouches for storage.  They seem to have a fondness for wooden sandals as well.
Weaponry: Clawed hands and feet.
Notable Features: Four inch horns on their foreheads, small spaded tails, and tiny dragon-like wings. They are not particularly intelligent, always seeming to be about as smart as a human teenager.
Sexual Characteristics: A large human-like penis that seems to dwarf the rest of the imp, along with two human sized testes.  They do have an asshole comparable to a humans, though it seems to exist more for sport and pleasure than for waste removal.

(Editors Note: I wrote some of these up at work last week, I'll drop them on here as I feel like it :D)