Phthirus pubis (pubic or crab louse), with a short, oval body and prominent claws resembling those of sea crabs.

Small crab lice having a blood meal with additional nits attached to pubic hair shafts.

Nit attached to hair shaft. Hard white concretions which contain lice egg. Very difficult to remove.

Pubic lice infestation. Difficult to see individual parasites without magnification. Inflamed bite marks or purpuric macules are diagnostic clues.