Small flies, convex, ovoid and heavily sclerotized, without wings,
halteres, and scutellum; length ranging from about 1.5-1.7 mm. Head
short; eyespots minute and without ocelli. Claws modified, comb-like.
Abdomen with six pleural sclerites; body covered generally with numerous
stiff setae. Immature stages live in wax combs of honey bees and adults
attach themselves to adult honey bees. (Peterson 1987, Papp 1998)