If they are on your monitor then clean the cage and get him treated with an anti-parasitic. Don't waste time with OTC meds, you'll probably need to get ivermectin.
pete620;489897; said:If it is very moist in the cage it could be these:
Springtails (Collembola)
Springtails (figures 336 and 337, chapter 10) can be troublesome in the soil in flower pots and in home greenhouses, as well as in houses where no plants are grown but where there are moisture problems. They are tiny,. slender, whitish or darker insects, and get their common name from their ability to jump (see chapter 10). They may become abundant in moist places where there is much organic material, for they normally feed on algae, fungi, and decaying vegetable matter. However, they may also chew on seedlings or the tender parts of plants, particularly near the ground level. They may be controlled by spraying the soil surface, pots, saucers, shelves, and affected parts of plants with chlordane or malathion.
http://www.entomology.ucr.edu/ebeling/figures/fig336.jpg
From:
http://images.google.com/imgres?img...refox-a&rls=org.mozilla:en-US:official_s&sa=X